FWIW I've started bypassing the drive on most of my heavy rhythm guitar sounds and using the bass cut in the amp instead. I generally switch to another scene that uses amp 2 for my leads and I'll use a drive block in front of that or a PEQ to goose it for more sustain. This way seems to give me more clarity to my rhythms and provides a little more flexibility for the drives, because I can select my drive X based on how it sounds best for leads and not based on how it cleans up the flub on my rhythm tone.
It seems like the feel has improved in recent firmware releases so I don't feel as much of a need to have a drive on my rhythm tones any more as well. I think the bass cut is part of it, but there's a lot more to that mojo.