As soon as Alpha 21 came out I played it with my two friends. We were surprised positively by most of the changes, but the few of them we didn't like are kinda big...
Good stuff:
New textures and models - We were positively surprised by the number of new models and textures right from the start.
Improved lighting - I feel that the lighting is kinda underrated in this game. It looks really good in some areas.
Harder difficulty in some POIs - This game has become way more challenging, and I love it. We were no longer zooming through the Wasteland like it was nothing. We were genuinely on edge and constantly looking around for any danger. I really like it. Scary and dangerous - like it should be.
Gore system - It's not Dying Light, but cutting off a zombie's head in half is still very satisfying. I'm glad this system was improved and implemented to other zombies.
Bad stuff:
The new magazine system - Boy, oh boy. I really hate it. I hate it with a passion. I don't know what is wrong with TFP. Why every next update has to prolong progression by another 100%? Why they can't just add more stuff to the endgame? We played for like 30 days and I can't even build a proper base, because I can't make a generator, because I can't find 25 magazines anywhere. And yes, I invested my points into the perk, but the amount of magazines required to craft a certain item is ridiculous. Most of the fun I had in this game came from designing bases with electric fences and that stuff. But I can't do that anymore, because the grind is so tedious, that it really stops me from wanting to play this game anymore.
Removing Sexual Tyrannosaurus - Totally unnecessary change. Now I have to invest points into two perks that affect one type of weapon to use it optimally? What if I get bored of one type of weapon? Now I have to pack my points into maces PLUS another perk to use less stamina on maces? Stupid.
Where are my jars? - You removed jars because you added a water collector? Another stupid idea. What if I don't want to make a base and I just want to travel all the time? My jars now dissolve from my hands after drinking the water from it so how on earth can I keep that blue bar full? Put a water collector (after of course unlocking it) into one place and wait for eternity for it to fill up? What a bad change.