7D2D is probably the best game i've played in many years so here are my thoughts regarding a17:
In any game most important is core gameplay, not some thing that you like to see in your HUD or not, especially with game as highly modable as this one, it's way too early to make any conclusions about final game HUD and it's not needed at this stage, also making most if not all HUD elements optional is quite easy for devs, i wouldn't worry about those health bars at all. Add here that people get used to anything really quickly, add the ugliest possible HUD to your top game and after several days you wont even notice it.
To me core gameplay is surviving, exploring, fighting, building, so what i personally am looking forward is harder to find basic resources like water, food, ammo, fuel, more zombie types and random events, more weapons and items to play with, more traps and options for base building, more POI, NPC factions, stories, quests, especially for stuff that can be done together with friends. And so far a17 looks very promising. Weapon system change is good and mod system sounds very interesting, also its better to find complete guns that can be used immediately instead of finding gun parts all over the place, at some point gun parts become completely useless.
NPC, especially if they are dangerous and will have good AI behind them, will be a great addition to the game and not only for PVE players. It will be hard to balance them but there are many ways to do that and i am curious to see which way will devs choose. Anyway NPC with toothpicks attacking players will bring only frustration and annoyance - they need to be really strong and killing them rewarding. NPCs can bring the most interesting new aspect to the game - a very dangerous and powerful 3rd party with their own lore and agenda, factions, missions, quests, items, skills, all depends how they are implemented. Raiding NPC base with your friends might be very thrilling experience.
Vehicles i don't care at all, for me 2 seat minibike would be enough, gyrocopter is very beautiful way to travel around and enjoy the scenery, jeep makes sense only if my friend can shoot while i am driving it - nice to have but that doesn't add anything unique to gameplay. Maybe NPC pair driving jeep and shooting us can become a players nightmare
3rd person view is a cancer for any game, but that's just my preference - 1st person view gives me much better and deeper experience while playing. Both options are valid and is pure player preference so i don't mind if both are possible, i just try to avoid playing PvP if both options are enabled not to be forced to switch to 3rd person.