Patel hasn't been great yet, but I have to say it was a vital move to get Franklin off. They need him to bowl a better length if he is to be of any use as an all-rounder. He's not fast enough or tall enough to bowl short and it's odd when you'd expect him to want to swing it anyway. Butler has a little bit of bustle and he's much more suited to bowling back of a length. Even though it's probably not the best ploy on a slowish surface, he does have the ability to catch the batsmen on an attacking stroke, as has already been shown.
Now they're starting to enjoy what Butler's bringing them too, so the next change can't be too far off.