That's pretty cool. Sucks that you're making these hard-as-hell stormtroopers in order to be the protagonist's bitch, but eh.
If the base armour was all coloured neutral grey then I guess you could get away with pulling camo webbing over the top.
If you were going to do a different camo of webbing for each different climate, then I'd expect you'd have all of the necessary survival tools for that climate in the webbing to begin with.
So I guess it'd either be one long-range VTOL with a bunch of different webbings and kits in it, or handy little color-coded choppers depending on where a specific squad is scrambling to.
Other than that, I got nothin'.
The base armor would be dark grey digital camo.
I think you misunderstand me on this point. All the equipment is the same no matter what mission. Hence you bring icepicks and miniature SCUBA gear to the desert and you bring the related desert gear on a diving mission. Obviously these things have restrictions, you're not going deep sea diving in these things, that stuff is for the dedicated marine units.
-snip-
Plastic faceplate? Why? Obviously these guys are counter terror or something. Why even bother with something like that when you plan to be facing enemies armed with firearms? Soldiers in medieval times who were equipped with full helms had metal visors (you know, made of something that can actually protect their face if someone swings something at you) and it's not unheard of for even those soldiers to take the risk of fighting without them in order to have increased visual awareness. If your visors are made of plastic in a world full of guns, I suspect soldiers forced to take them along would either throw them away or fight with them raised anyways.
Suppressors are patently NOT something you just take all the time as a rule. They are a calculated choice based on the requirements of the mission. You can't just say they take this and that weapon all the time because real tactical units today don't do that. They pick their weapons based on what they anticipate. What advantage could there possibly be to forcing these men who are meant to be deployed anywhere to be totally inflexible in the equipment they use?
And ice picks...? Just no. It has none of the uses of a knife. Not only can a knife be used for things other than stabbing people, a knife can inflict more effective stabbing wounds because the blade is so wide. I get the strong sense that this is just a rule of cool thing and not a choice that actually has a coherent idea behind it.
Attachable neck plates are a thing in Marine Interceptor body armor (center) and AFAIK hardly anyone in combat uses them because the hard plates dig into your throat if you try to look straight down. If you're engaged in hand to hand, an enemy who you're wrestling with that deliberately pulls or pushes down on your head he can literally choke you out with your own armor. Unlike the ice pick this is actually something real soldiers are known to wear (though I haven't read any accounts of troops IN COMBAT who preferred to wear them) so don't consider this as strong an objection as the other points I've brought up.
For the plastic faceplate, remember this is modern reinforced plastic (even slightly sci-fi in how it is reinforced) not cheap crappy stuff. Your allusion between these and medieval visor helmets isn't really... suitable. The faceplates are designed to be a happy medium between protection and visibility (it doesn't really restrict the soldier's field of view much in the story), whereas medieval visors were mainly for protection and thus limited visibility. In addition, the faceplate is part of the suit, not a helmet. There are no attachable neck plates in front because the faceplate is thicker here and does the same purpose without the choking hazard mentioned in your last paragraph. The armor in the collar of the suit is in the collar, ie the bits that stick up around the sides and back of the neck.
RE: Suppressors: The soldiers have to be able to react to any situation or change in mission dynamics at any given moment. In a loud op where stealth doesn't matter, yeah sure your point is valid. But what if you don't know whether or not your next mission is going to be loud or stealth? What if you start loud then realise that you need some people to stealthily be somewhere else? Taking suppressors along is an overall plus for what little they weigh.
RE: Icepicks: It was a little bit influenced by rule-of-cool, but only a little. A knife has it's uses, but so does an icepick. An icepick has a smaller contact area, which means more penetration, not to mention the force amplification the handle gives (as a lever). An icepick can be used in more situations other than just climbing ice mountains; it can be used as a grapple, for example. Good luck trying to grapple onto something with a knife. Imagine a soldier skidding towards the edge of a roof, pulling out an icepick and hooking it around a railing, last second. Good luck doing that with a knife. I'm not saying knives are worse than icepicks in hand-to-hand combat, but in close-quarters, a pistol is just as effective as a knife. The icepicks are more for utility purposes. I know knives have utility purposes of their own, such as carving stuff. Yes when it comes down to it, a knife is a more effective weapon than an icepick, but icepicks aren't totally useless, and these soldiers pack two of them. The choice had a coherent idea behind it in that they have a pistol which can be used equally as effective as a knife if it comes down to it.
I summed up your issue with neckplates in paragraph #1.
I always assumed they were counter-knife stuff. Hence the plastic and the thin armor which wouldn't stop a proper bullet anyway.
Plus if you make them reflective then that has psychological bonuses, as well as a rule of cool thing, or a 'oh god i'm killing real people' reveal.
Yes and no. They wouldn't stop a .50 cal bullet, but they may just be able to save you from shrapnel from a frag grenade or maybe a glancing 9mm bullet.
I never planned on making them reflective; would ruin stealth.