I had it a few years back, it works of course, depends where you want modulation. It's all I could afford at the time so I didn't have much of a choice.
Try it
Aztec Rotors are beastly, more holes also means more chance of breaking so be careful with which you pick. I literally used to land on my Aztec rotor before and not a thing happened to it, didn't even bend!
Onza stems usually have decent geo's, maybe it's your bars that you need changing, try tilt them and see if it feels any better.
Better to adjust something than splash the cash
Well I hope it works, I had a Hope pro 2 before and the exact same thing happened. Only problem is it broke so much I can't actually remember how I fixed each problem
EDIT: There's the problem.
Maybe the frame has worn so it can't tighten to what it actually wants, try putting a washer on the outside of the frame, or you could shorten the thead on the bolt. Best to try the washer first, and if that is the problem cut the bolt after.