I would not ask the college coach, because he would most likely want her on the most competitive team possible but their goals and hers/yours are different. DI is all about winning and grinding out the players to achieve that goal. Your daughters seems to be about enjoying the game, keeping skill sets sharp and keeping balance before entering that DI craziness.
Don't over think the situation but respect what your daughter is conveying; she needs to gear down for a bit and wants to enjoy her senior year.
The reality is, no matter if your daughter plays on the #1 club team in the country or steps away completely from junior volleyball, the college coaches will judge her based upon her performance once she arrives on campus.
If this potential club change during the senior year allows her to arrive in a physical/mental state to perform at her maximum level, then great. If this new direction her senior year results in her not performing at an acceptable DI collegiate level, then she will be cut.
From your information, I would support your VolleySetter's desire to go with a new club and recharge the batteries before college. As long as she is getting good coaching and playing in a respectable number/quality of tournaments, then she should be OK.