It's really hard to come up with a national list at this point but I won't argue with you too much. I don't know enough about who is transferring out and what everyone has returning to make predictions nationally but here are my thoughts about the PAC 12 with the obvious caveat that things can change drastically.
Arizona - Definitely a top 20 caliber team. They return most of their roster and it's a talented one. Not an elite roster like Sean Miller used to have, however.
Arizona State - Hard team to predict. They were very unlucky with injuries this year and they will have a new roster next year. They are bringing in a big kid from Canada who should help him inside. I assume Hurley will fill some of the cracks with the transfer portal and they should have a Bubble team.
California - Matt Bradley is transferring out and there's not a lot of talent left on the roster. I don't see Fox bringing in a ton of really talented transfers so it's likely another bad year for the Bears.
Colorado - CU is losing a lot of experience and talent but Boyle has recruited surprisingly well. I think there will be a drop off from this year but they'll be competitive in the PAC. Similar to ASU IMO.
Oregon - Oregon's team is going to look very different next year but different isn't always bad. They may have three 6'11" centers who were top 40 prospects in their respective classes with Dante, Bittle and Kepnang. If Richardson comes back and Altman can fill in the cracks with some transfers who can score from the wings(which he has traditionally been able to do), Oregon could have a very good team next year. Top 15, possibly top 10.
Oregon State - I'm assuming Thompson won't be back which means Oregon State will take a step back but it won't be a huge step back. Tinkle is a great coach and this run was a total fluke. They figured some things out late in the year and he's found some transfers that can play. I expect them to be at a similar level to CU and ASU next year.
Stanford - This is another tough one to predict. They had a much more talented roster than they showed this year. They have Ingram coming in for next year but I have to see it from Haase before I believe it. This year was really a disappointment in my eyes.
UCLA - I'm assuming that Juzang isn't going to be back, if he is, they are a top 5 team and possibly #1. Even without him, they have a very strong core returning and are adding some talented guys to the mix. They should be the favorite to win the PAC 12 and should be top 10 at a minimum.
USC - On paper, they should take a step back without Mobley. But Enfield is always active in the transfer portal and we'll see if he can turn his on court success into portal success. Even without landing any huge transfers, they'll have enough talent to make the NCAAs. If they want to compete with a PAC championship and make another run, they will need to get some talent from the portal.
Utah - Likely a total rebuild for Utah. A lot of their top players have entered the portal after they got rid of Larry K. I like their new coach but I wouldn't expect them to be a tournament team next year.
Washington - Almost every Husky player has entered the portal. This usually only happens after you fire your coach. I don't understand the "Hopkins gets one more year" line. It's unlikely he's going to convince top transfers to go to UW and next year is unlikely to go really well, which means he's likely to get fired and the program enters the rebuild. UW should have went ahead and just fired him this year and started the rebuild rather than trying to do it next season and the following season.
Washington State - Kyle Smith is a fantastic coach. WSU was in the top 25 in KenPom's defensive efficiency. He's getting the most out of his roster. His next challenge is to find ways to improve his roster. Wazzu isn't a destination for recruits out of high school so he's going to have to use the portal effectively IMO if they want to take the next step.
