I think this alpha is the worst in many years. There is a horrible lag, even on best pc-s. Turrets and vehicles falling through the world (still after 4-5 years). The graphics and lightning are really outdated in 2022. The zombies are few, and boring, the overal graphic design is lacking. There are few new stuff, but many performance issues.
Only thing i can praise is the level design, it is fantastic. T think this game really need to be gold now, and lets all just move on to 7 days to die 2.
Your point about zombie sameness is salient.
I drove through the snow biome just the other day playing with friends and one thing that stood out as same, same, same. The woodcutter.
Same ridiculous looking lumberjack again, and again, and again. Same mountain lion again and again. It really is boring and sort of lies at odds with the devs efforts to add new stuff; which granted, they have, but that repetition with the same zombie model is absurd.
Simply adding a little colour variation would work wonders, and perhaps size variation.
The previous lumberjack look like a towering menace and was genuinely intimdating, but this wretched little nothing of a model is an embarrassment.
Also the snow biome terrain should have an addition of some blending colour for these mountain lions. Them being beige prancing about in the snow means you can spot then a mile off. It's only the incidental tree density that hides them, unlike the snake which; whilst being pathetic, blends nicely with rocks and even grassy terrain.
More animals need to be added really, the idea of hearing birds everywhere and every day but never ever seeing one is something else that winds me up. This would really liven up the world and add more atmosphere and realism to the real world aspect of the game, zombies aside.
Maybe anti-venom could be a thing also, for snake bites.
I think other weapons should be added too, not like the Conan battle axe we have and bizzare drones that fly eternally and follow the player - but simple things like the ability to wallop zombies with lengths of pipe, and bricks. Just crude weapons, we already have rocks in the game and short iron pipes why not enable them as rudimentary weapons?
Mods exist yes, and I know you can knock ten bells out of the living dead with banjos and other nonsense, but I think a game where survival is key, themed like 7 days, the game has thusfar short changed itself in a way by not giving us the ability to go crazy with the aforementioned pipes and stones (which would break bones

)
(Long post I know, but while I'm on the topic of weapons - the Mugiwara reach on the zombies is another thing that needs attention. I had my ankles taken off by one of those filthy crawlers, that hit me yet I wasnt able to hit it despite wielding not only my arms length, but the full extension of the baseball bat. Wtf? )