In the UCONN program, the impactfulness of a player is largely determined by the player herself. You earn minutes if you practice well. The more minutes you earn, the more meaningful those minutes become, and the more potential there is that you can make an impact. The system is entirely merits based, independent of your ranking. MW is the number one recruit in her class. To argue that she has not been impactful so far because she has not been needed to be impactful seems to me to turn logical thinking on its head.
Geno himself has expressed his frustration with the benchers on multiple occasions, and at least on one occasion explicitly refuted the idea that he did not need a deeper bench; in fact, he stated quite the opposite: he needed the bench to contribute. If MW had earn Geno's trust, I could easily have imagined that he would have inserted her earlier in many games and for longer stretches of time, but he elected not to do so. In one blow out game, he even went so far as to not play her at all to send a message.
I think highly of MW's talents; she was not ranked number one for no reason. With the kind of coaching that is available to her at UCONN, her potential is literally limitless. What she does with that potential and how she impacts the team rest largely in her own hands.