Obviously there are negatives to staying independent in FB and I'm sure university leadership are good with staying that way for now, but here are some of the negatives of UConn going to the PAC:
1. You are viewed with the company you keep and the new PAC is basically the old Mountain West with a few better sprinkled in.
2. There is no media deal yet signed, so no one even knows what you'd be getting into.
3. Travel/distance/Pacific time zones to deal with.
4. Nothing in common with any of the members; athletically, academically, culturally.
5. Reduced attraction for Eastern seaboard recruiting grounds.
6. You're locked in to a GOR and exit fee.
7. Reduced opponent flexibility due to conference commitments.
That's just some of the cons. There'd be cons to going into the Big12 or ACC, for instance, but they'd be much reduced and I'd imagine well worth it in the big picture.