If it were just about any other light, I'd agree. But the Locusts are so goddamn fast and small (especially after Ye Great Scale Rework) that you can practically dance circles around just about anything that isn't another short-ranged brawling light piloted by someone who's just plain better than you. I mean, shit, my last match of the night I brawled at <20m with my ERLL 1V against a Commando packing SRM6es and completely took him apart even though that's basically the worst Locust setup in CQC.
That's what I was getting at before. If you're running a LPL or ML build on a Locust, you basically get one, maybe two shots, and then you have to relocate, because poking repeatedly from medium-ish ranges is a good way to get blasted by some clanboy packing a bunch of UACs or whatever. With the SPL you can do the same thing, but you also run real cool and (probably) are playing the PB, so you've got ECM, which means that if you really need to you can run a few laps around your target and then dart away when they've turned away from your escape route. If you're running an ERLL you can poke with near-impunity against anything that's not built as a sniper, since you're a tiny little pixel a kilometer away that appears for about a second.
That said, I like 6x ML on my 1E because that alpha damage makes the risk worth it in a way that the single LPL isn't (at least IMO). The LPL doesn't have the damage to make trading worth it even if you had the armor to do so, so you're going to be constantly moving to avoid the enemy predicting you popping out somewhere. And don't get me wrong, I love the LPLs, and like I said my RVN-4X is a kill-securing machine with them, but it feels really awkward--again, probably just a dumb personal thing, since I tend to gravitate to the two heavily separated playstyles of ultra-pussy backline sniper (only in lights and mediums though, people who run sniper assaults are selfish assholes even if it is in-meta from time to time) and crazy brawling bastard (albeit only with a handful of mechs); the mid-range shooting gallery business doesn't really do it for me save for a couple exceptions.
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Kinda meandering and I probably already said something like this, but the Locusts are the light mechs of light mechs. If you played WoT, they're like the pre-nerf T-50-2, except that they can out-turn anything and move fast enough to outrun most mechs while going in reverse. Some only have the hardpoints to snipe, so their speed and size helps them avoid return fire and escape other lights; others have good hardpoints, so they can abuse their speed and size to troll the enemy team. They'll swat you eventually if you stick around too long while they don't have bigger targets to shoot at, but even then it can take a lance or more upwards of a minute to nail you if you're on point with your dodges and use enemy fatties as cover.