I have many things to say about this and I don't know how to put it all in one paragraph without it sounding weird, so I'll make a list of points instead.
1. Honestly, time stop isn't that fun of a mechanic. I rarely found myself using it, since it slows the game down to a halt. Plus, it's super broken.
2. Rockets need an overhaul. There's so many ways I can think of that they could be used for movement that would be really fun to do (i.e. boosting yourself off a wall with a rocket) but you just... can't. It makes me kinda sad.
3. The wall sliding feels kinda weird. I don't know how to say it, so I'll show a picture to demonstrate my point:
4. Punching is super fun. I'm a big fan of punching in first person shooters anyway, so yeah. But I'd recommend to nerf it a little, since you can just one-shot enemies if you hit them in their weak spots.
5. PLEASE let me scroll through my weapons with the scroll wheel. Because holy crap, using the number keys in the middle of a fire-fight is not intuitive at all.
6. Reloading is kinda slow.
7. Here's a suggestion for a mechanic to stand the game out from other similar FPS games: draining health that you can regenerate using batteries dropped from enemies you killed. It encourages fast and aggressive play and would fit right in with the futuristic style of the game.
8. buff the pistol more lmao
9. Don't listen to point 8.
Sorry if it's a lot to take in