Hmm. I mean I guess things could be adjusted such that MCH could perform equivalent damage without Rapid Fire. I read the other suggestion about making it a Barrage like ability but that seems like a rather cheap fix. What if.. It was actually like the old Barrage that increased auto-attack rate for it's duration? Seems like that would make a bit more sense thematically and wouldn't need to worry about it being a direct copy. Or affecting anything else within the OH window. At 15 sec you could pop it with Flamethrower and it could last throughout OH duration. On second thought that might be bad since FT cancels auto-attacks.. But something like that would solve the main problems with RF weaving I think.
I forgot about that document of suggestions the other Fox made
One possible issue with this is that the auto-crit abilities typically only affect first hits. If that's not changed then you're not really using it any differently than now.Rapid Fire: As said above, its actually decent but needs some tuning for ping issues. My suggestion - Rapid fire is now called Double Fire: The next GCD is fired twice. This will allow for some sweet Reassemble plays.