In the first alpha of 17, yeah it was fine. A few points in STREX and I didn't even need coffee on my melee build. I am not sure why everyone is so unhappy with this, the wait for stam regen isn't that long, it was longer in older alphas wasn't it?
Playing devils advocate here. The issue with the current Stamina system is simply, that while yes, it regenerates fast, it also drains fast. This create the issue:
Old style: Do a bunch of actions, clear area, pause, do more actions, use some food or drinks to speed up recovery... repeat.
New style: Do a few actions, pause, do a few actions, pause, do a few actions, pause ...
You feel like your playing a 250kg man, that has no stamina at all, that acts like his is having a asthma attack after a few ( non heavy ) hits.
Then after you kill some zombies, you magically start getting better ( XP points > Skills ) at some actions but its still more a stamina micromanagement game. The buffer you had in A16 or before, is gone. Same with starting in a bad starting location ( RG ) and you needed to run to find a good spot, that was so much fun in A17. /sarcasm
A few words i use a lot in my complaints is realism and suspension of disbelief. When you push a game into one direction too much, it starts to eat at people their suspensions of disbelief.
And its so boring to always have those micro pauses to regenerate. Before in A16 you had more control over your stamina. Running low, eat / drink, to push up your stamina while doing a activity ( like distance running ). A17 eat / drink to have normal regeneration but you directly have little control over it. The game has taken away your direct control and in return gives you constant micro pauses until you perk up. And those perks feel forced, so you end up with the same type of builds on every game start.
Take in account what i write depends also on the build. We have had a lot of A17 Experimental builds, then A17 Stable, now A17.1 ... information tends to age very badly with A17 its constant changes.