Hello! I have a few suggestions that I'd like to open up for discussion. Without further ado, let's begin with:
I'd like to see damage based on body parts in the game. That said, I'd also like to see partial armor. If I'm only wearing a bulletproof vest, the obvious solution is to shoot me in the arms, legs or head, which should be unprotected. Each armor should have a list of body parts it covers. This would lead into partially damaged armor. I'd like to be able to equip the front portion of a combat armor whose backside is burnt (with straps holding the back?), for instance. That would lead to interesting tactical choices as I would have to keep facing the enemy as I retreat.
Hit points and Damage:
Have two types of damage: point based and percentage or total health based. It breaks immersion for me if I suddenly end up being able to survive six shotgun blasts to my bare head just because I'm at a high level. On the other hand, I might be able to shrug off some damage from darts or other minor sources as I gain experience. Another example would be structures or robotics: A bunker wall might have very high number of hit points. It would take constant damage to its hit points by conventional firearms. But a rocket launcher might have 95% damage against structures, and it would take the
Regarding damage, it'd be nice to have things like broken legs, gouged eyes and ripped off limbs that would lead to interesting medical choices. You could put someone with chopped off legs into a wheelchair equipped with rocket launchers, for instance.
Level ups and NPCs:
NPCs (and various other critters) should have the same level up structure as us, whatever ends up getting used. I don't want enemies with, as an example, 1000 hit points at level 30 while our characters have 100. If that happens, please make it have a reason (super radioactive resistance?). If we have to fight someone more powerful than us, genuinely make him more powerful, don't just pile on hit points. That feels terrible.
And these are all the things I can think of off the top of my head!