Admittedly I haven't played in a while, but the game already gets harder as time goes on, does it not? Special zombies start showing up more, foods start going bad so that scavenging isn't as easy, etc.
I for one am 100% against any kind of level or power based scaling. Hated it in every game I've seen it in.
I honestly never understood the desire for it. If the world is going to "level up" with you, whats the point of leveling up? Why even have any kind of character advancement if it's made meaningless by everything else staying equal to you?
Actually, I agree entirely. It's a roguelike trait I'd like to get away from; most roguelikes have goblins on level 1, orcs on level 2, ogres on level 3, trolls on level 4... and they're all the exact same monster, except scaled to provide more or less the same degree of challenge to a player at that level.
I try to get away from that by at least making special zombies unique in some way; a fast zombie isn't just a tougher version of a normal zombie, it's got unique advantages that call for a slightly different strategy.
For a long time, all zombie types spawned concurrently at the start of the game. While this made the game feel less player-centric, it was also genuinely less fun. It was an information overload instead of slowly revealing things over time, it didn't give the player any deadlines to meet (i.e. "be able to handle a skeleton by 8 PM"), and deadlines are fun, and it was just too hard right off the bat. Encountering a zombie hulk as your first monster is no fun.
The main purpose, to me, is that it doesn't lead the player on. Currently, if you want to survive, you must powerlevel yourself to the point that you can kill hulks and some brutes. This restricts your gameplay, there is no other option available to you. You can either fight and level and race to get your skill up before the hulks start appearing, forcing you to do something in order to continue playing, OR you can play differently, not skill up, and get outrun and smashed down by the first brute. You're not allowed to be a flighty, stealthy scavenger or a cowardly nerd. No, instead you must fight and kill, or else you get killed due to your low level. You can't enjoy the early game at all, you MUST take the course of action that the game wants you to take.
I would like to see some degree of freedom of progression. Allow you to be a scavenger with no electronics skill for a bit longer and let you run around from town to town eating and fleeing, if that's the style you desire.
That style is totally viable. It might just be because I'm highly skilled at the game, but I have no problem not becoming a melee / firearms badass and still surviving. It is entirely possible to be a flight-based character with the right know-how, tools, and a healthy level of cleverness. You just have to think outside the box a bit. Lots of players are trained to kill all enemies in roguelikes, so that part might be pretty difficult. You also have to use the environment to your advantage, which is another thing roguelike players aren't used to, and so they might not think of.
Of course, having an NPC bodyguard will make it easier for those without the Cataclysm experience to make it solo