I would have written this post on the forum or on the Discord but, unfortunately, from what I have already seen in the gaming world, people (especially the ones from niche communities) tend to be quite narrow minded and try to defend "their" game without being objective, or just for the sake of creating useless discussions.
Hope the Steam hub helps moderate this sort of situations.

Anyway, here we are.
The game is pretty fun, it has some issues (i've seen another post called "Feedback" with very useful suggestions too, if you want you can look at that as well)

The only cons that i've noticed at this point are:

• Optimization
  It needs to be improved, definitely.
  
  
• Melee feels clunky (and, sometimes, it seems like you don't do damage even if your bayonet goes through the body of your enemy. Ping issue, probably)
  
  
• The shooting is quite good during certain situations and quite frustrating in others. (missing very easy shots from less than 50 meters and then reload for 20ish seconds isn't the best of the experiences in my opinion)
  There are a lot of variables to take in consideration, maybe too many.
  Your weapon, the bullet that you are using, the wind and yada yada yada.
  
  Cool stuff, don't get me wrong, but all this sort of things adds chances and doesn't help with fully understanding how you should shot and where you should aim precisely because there are no constants, all can change from match to match. (at least, the wind can)
  With the same variables i figured out that, sometimes, you can't it all of your shots. (which is quite okay i mean, weapons were not that accurate at the time) but i just hope it's gonna improve a little bit and not become an Holdfast 2.0 with all this RNG stuff.
  It's always hard not to cross the line between a good gameplay and a realistic one but frustrating and/or overly complicated.

On top of that, in my personal opinion, 20$ (16$ at the release as far as i know) it's a bit too much for the current state of the game considering all the bugs and so on.

I will probably buy it anyway and enjoy trying to improve myself. (since i got only few hours in the game and i haven't tested everything.
These are just my first impressions keep that in mind)
Hoping there will always be a competitive side when it comes to shooting and hand-to-hand combat and that things don't rely too much on the luck aspect.

Please, do not treat me like a newbie and do not impose yourself, i don't give a damn about all that elitarist stuff like "oh, i've played this game since the first alpha test blablabla"
i am just expressing my personal thoughts without the intention of creating flames and so on.
I am sure that there will be people who will think like me and others, however, who will not.
It is perfectly normal, the important thing is that everyone respects the opinion of others without leading to useless discussions given that, especially right now, there is not enough information to actually understand who is right and who, on the other hand, has wrong or blurred conceptions since this was only a demo.

Despite all, I would still give a positive review on Steam if it was already possible to encourage developers and support them.
The game has potential, it just needs to be grasped.