I think that it boils down to level caps. From what I understand, and have seen via screenshots, the cap is 99 or 100.
Mathematically speaking, the further past the level caps you go, the more that classes who have per/level abilities will leave the others in the dust.
Add to that the fact that warriors have the least utility of all of the other classes, and it's kinda meh.
Again though, that's if you stop at level 24, or not. You can still finish the campaign with it. It's just kinda "meh" the higher that you go.
Back to you Bob. I mean Morpheus.
PS, I'm not kidding about being able to shove bystanders though. They're annoying, and sometimes force reloads.