It's pretty easy to see this as "Ray-traced Doom" but the game builds its own identity very quickly. Project Warlock is very, very good. The map design is great, the visuals are good, the combat is fun, and the creative design is enjoyable.
There are a lot of games you can call "modernised doom" but this one nails that premise exquisitely. Everything about this style of game is done well: The weapons system allows for choice and variety but never leaves you empty handed or defenseless, the map design has the nonlinearity of Doom with memorable and challenging combat scenarios, the enemies are creatively designed and each one presents something new, and every single kill is satisfying; the animations are perfect. Even the secrets are implemented well.
The two main drawbacks are the bugs (mainly the one where the player is liable to phase through elevator floors) and the sound design, wherein certain enemies have disproportionately and agonisingly loud noises associated with them, to the extent where even a low volume would hurt my ears. Neither issue is prohibitive. I also found some other bugs but they weren't that bad.
Good visuals, good combat, fun gunplay, creative design, good music. A huge recommend for anyone interested in this style of boomer shooters.

All in all a good time. After the first few levels I wasn't sure if I was going to like it but it started to grow on me pretty quickly. It's basically done in the style of classic Doom with a large variety of enemies and bosses. I get the feeling that its designed for speed running based on how quickly you can move around the levels. The only thing I didn't like was the weapon upgrade system. The upgrades themselves are awesome but it locks you in to one of two possible upgrades. I guess to increase replayability but to be honest I doubt I'll revisit this one any time soon. The boss battles start off strong but tbh by the end I was kinda just ready for it to be over with. Whereas some of the enemies are quite interesting and have a variety of abilities they basically move straight at you and attack whenever close enough. Hopefully enemy AI is improved in the sequel.