i find when i grip a chord i usualy walk my fingers in position from the high e up to low e so sometimes when playin on my first strum i'll try an aim more for the higher strings to give my fingers time to get in place. i know this is bad habbit and try and force myself to do cleaner changes.
most of my playing is either barre / power chords tho here recently i've started using much more open chords. the b7 is a new chord for me i really like, and i'm getting better at it, but still a bit clumsy on the switch.