Ok, I've had a taste of the beta and... yeah I've had fun but I agree with those who say it doesn't feel like Doom. I dunno about those who say it feels like Halo as I've never played Halo but I'm sad to say it felt more like Call of Duty than Doom to me.
Loadouts, weapon number restrictions, perks, level progression... there's even a glowing pathway to indicate you where the objective is in the map. Man.
Among the good things, more of a sense of verticality thanks to the double jump and ledge climbing and there's no weapon reload slowing down the fights.
But overall this doesn't seem the Doom I was waiting for, so I'm not gonna buy it, not day one at least. As of now, looks like if I have an itch for Arena FPS, my choice has got to keep being the king Unreal Tournament, which as far as I'm concerned, even in its alpha state, is already superior in terms of gameplay and even visuals. Like, graphics looks like kinda blurry and textures don't look like particularly high res like in the screenshots I've seen. There were no advanced graphics options in the menu though, so I dunno at which level they set the graphics at. Benefit of the doubt there.