I've been defending Washington all year and I still think he has a ton of talent. I'd be very surprised if he doesn't transfer at this point.
He wants a system where he can be the guy, play freely and attack whenever he wants. That might not be anywhere in a power 5 conference. I haven't seen McKinley Wright play this year but I feel like he has a lot more freedoms (and has performed better with them) so I could see IW looking for a situation like that.
Recently, he has started making subtle and not to subtle posts on Instagram including one about how he regrets Nov 11th...which is the day he signed with the Gophers. That doesn't bode well long-term if Pitino or anyone expects him to be a part of the program next season.
Without him in the fold, and assuming no late signees/transfers who are eligible to play right away, the Gophers PG situation for 18-19 is a combination of: McBrayer, Coffey, Kalscheur and Harris. I suppose Rudrud and Conroy are back as well. Personally, I don't love not having a true PG on the floor but I'm not sure Washington is a true PG so not really sure what the big "loss" is in that sense.
I hope I'm way off here. His body language on the bench has been better but his on floor production is horrible. Missing easy shots, a ton of turnovers per minute played and seems to lack confidence. I thought he might get a shot in the arm being back in NYC but clearly he didn't or didn't have the minutes to prove he was ready for more.
At this point I'd ride Harris and have him play some PG to see if he can do it. Figure out if he can be a primary ball handler next year. If he can, then you don't need Washington (though I'd still prefer to have him on the team)