The D&D-esque attributes of the current skill point system are the biggest hamper to build creativity, IMO. But they're also tied to dismember chance and head shot damage, both of which are significant contributors to damage output and therefore survival. Much as I'd love to see them gone so you could level up whatever skill you preferred, a LBD system for many of those skills could solve it, but that's outside the scope of what Joel mentioned the other day.
I am all for a system where the game feels less like 7 Days of Checking the Mail, so I'm excited for that, but I also see why some folks are frustrated. It's also why I remain in wait and see mode. Granted, I had that approach with 2.0 despite my suspicions, but I kept mouth shut as to not poison the well (the well being my friends opinions based on their experiences with 2.0). Now here we are with 2.5.
That is easy to fix, Have the action skill add the headshot damage and dismember chance every 10 skill level, 10-80 is 10% per 10 skill, 90-100 is 15% per 10 skill for headshot damage, this will match what u get for 10 in a stat. This is how Darkness Falls puts in the dismember chance and headshot damage, its part of the action skill itself. I would love this game so much more if the weapons, harvesting and salvage tools were decoupled from stats along with their respective perks, and the action skill level determines what level of say Pummel Pete, and its attack speed perk can be learned.
Or if they wanna keep the stats they seem so hell bent on, Lower it to 3 stats: Combat which has all the weapons both melee and gun, and the base stats of Combat effects headshot/dismember bonuses for every weapon. Survival which would be stuff like cooking, mining, salvaging, and such, then Defense, which has stuff like the armor skills, Pain tolerance, Parkour etc. My ONLY issue with the stats system is JUST The fact that weapons and tools are locked to the stats, if they can solve that problem i'd be fine with the current stat system.
As the current stat system is much to restrictive especially when some weapons are just above and beyond better than others. IMO the best guns in the game are shotguns once you get pump shotguns, they hit like a truck, force zombies to walk speed for 4-8s after being hit, and has a insanely high dismember chance. The downside/balance factor to the shotguns is the short range.
9mm Pistols and the revolver are basically useless later game, desert eagle is decent though as is the Smg as the Smg has insane DPS but it is a ammo hog.
Rifles are mostly useless other than horde night, they are very unweildly to use inside of a poi, as even a shotgun has way better hipfire accuarcy which is silly.
Int weapons, sledge turret/robot turret are useless, the turret that shoots does such low damage that it tickles ferals and is basically useless on anything higher. DF fixed this by allowing it to fire iron spikes, like the Spike traps do, which up its damage to 60-70 a shot on a max tier one with mods. Sledge turret is only good for knockback, it does pathethic damage, and is slow. Stun baton is nice, but your mostly 100% depending on that 10% chance to insta kill chance to have any sort of real kill speed later on, but at least, the enemies are going to be basically perma stunned so while they take forever for a stun baton user to kill, at least they cannot harm you either.
Machine guns are the other useful weapon, hit fairly hard, have long range, have high dps as well. Downside is expensive ammo due to the gunpowder cost, and the fact alot of the fort perks in the tree are pretty worthless imo other than pain tolerance and the machine gun perk itself.