Homebrew Brawler archetype advice

[langcal]

I love the brawler's flavor, but I'm not a fan of martial flexibility. It's a great class feature, but I don't want to waste time trying to find the "perfect feat" like I know I will if I use it. :P

My question is this: Would it be overpowered if I created an archetype that replaces Martial Flexibility with Rage? I plan on switching out some smaller stuff to make him into a dirty fighter, but I'm worried about how this major switch will affect the balance of the class. Any other suggestions for replacements are welcomed.

Thanks for your time.

[Deadmanwalking]

That seems a reasonable replacement, yes. Given that it gets replaced by Mutagen, anyway. Same number of rounds as a Barbarian.

I'd do that, and replace something else with Rage Powers if you want them. The bonus Feats seem an obvious possibility.

[Secret Wizard]

That works. MF even has a 1/2/20 progression for major features.

I'd also replace Maneuver Training. Make it a +1 bonus to saves against fatigue and sickening. At 17th level, grant immunity against fatigue and sickening. That way you have a tireless rage too.