'You reap what you sow'
BC and other schools in the ACC still want no part of UConn as a member because of the lawsuit. Yes, Pitt joined in the lawsuit but the ACC perception is that the lawsuit was a UConn production and people generally do not want to do business with people who have sued them previously.
Now not to say that the other ACC schools would not have exerted their influence and tried to get the schools that oppose UConn to accept them as a member if UConn had been a better choice based on TV markets, etc. but that was not the case. Conferences add the most attractive teams first and the ACC did so in adding Miami, BC, VT, Syracuse and Pitt and the Big12 took TCU and WVU from the BE.