Cleaner HUD?
I can understand the tutorial being there. I see why you have to display 3 weapons, but it's messy and make the controls confusing. I'd suggest going with traditional controls, switching between what you hold all in one list like Half-Life. The vitality, armor, stamina could be cleaned up by representing them as a percent or health bar. That's just my 2 cents, I don't understand the game fully to really know what's important to gameplay. But from experience, most people like games they can pickup really quickly and that means sticking to FPS traditions.