I think it depends which way they want to go. If he's going to bat at 3 it's a problem of technique and he needs to fix it. If he goes back to four which he should it becomes less of an issue again. Still something to work on, but not as important.
I know he's not popular, but Vince is about the only batsman in the country who is scoring runs batting at 3 in the CC (other than Ali, who we've seen enough of to know isn't an international number 3) and he's doing it at Div 1 for once.
There's an overkill of all rounders and everyone is batting one place too high so dropping one of the spinners (my choice would be Rashid still, I don't think he troubles top order batsmen) for Vince and moving everyone down one just creates a much better looking balance of the side on paper.