First of all: Merry Christmas!
The health bars are somewhat that troubles me. They seem misplaced in this game. Its sorta immersion breaking.
Knowing how much life the lifeless stinky walking meat bags have left seems inappropriate. It kills the randomness of situations and instead replaces them with a pure numbers game. This is okay for RTS games and probably for quiet a few other genres but it feels misplaced here because of the nature of this particular game.
And even in PvP it feels wrong. Sure, in a real life situations you might see your enemy bleed and you get some sort of idea how badly wounded he is - which we can't really see in 7 Days. But on the other hand we shouldn't know for sure. In a situation where we both are wounded I would probably not re-engage carelessly sticking to the small chance of maybe winning the confrontation. But if I'm able to know that my opponent has just 10 hp left while I'm at (i.e.) 50% it will radically change my decision making.
Same goes for killing Zeds. Its awkward to think "oh hey, just 20 hp left" and kill it without fear instead of "hm ■■■■, this guy still stands" and stay focussed and careful.
If this really is something you guys want to implement please consider to make it a setting on game creation. Which either activates or deactivates it for everyone.
Thanks in advance.