Here's how I see each team based on where they are right now for next year.
Kansas - one of the best three or four teams talentwise in the country. Just loaded as long as everyone shows up eligible. If they add any other pieces, look out. Final Four caliber. National title contender.
Baylor - if they solve their PG situation, Baylor could be very good next year. I don't know how they are replacing Lecomte right now, but the rest of that roster next year should be legit. With a decent PG that can run the show, Baylor is a Sweet 16 type squad next year. Without a PG, they probably miss the tournament entirely.
Iowa State - probably will experience the biggest bounceback candidate. They are bad this year, but help is on the way for them. They should be back in the tournament, and probably around .500 in the league next season.
K-State - they return most everyone, so its not critical for them to bring guys in. Next year is the prove it year for Weber, because he will have Stokes, Brown and Wade all as seniors. This is Weber's best chance in Manhattan. If they aren't top 3 in the league, 2019-2020 is going to be U-G-L-Y.
Oklahoma - if OU doesn't sign a capable PG, we will see a repeat of last season. We know what that roster looks like without a PG. We know what that roster looks like with a PG. Next year's roster does not have a PG. That's all you need to know. Kruger needs to find himself someone to run the show.
Oklahoma State - this is the hardest team to figure. They have some athletes, so that's nice. But they aren't all that strong right now, and I don't know that any of the guys they are bringing in makes them that much better next season. They are probably two players away from being a tournament team.
TCU - Jamie Dixon is building something in Fort Worth. The biggest help will be having Jaylen Fisher back healthy, but he's surrounding him with the right amount of talent. Dixon built some good, tough, rugged teams at Pitt. He's finding his way to do the same at TCU. This will be a tournament team next year. They could get hot and make a run to the second weekend.
Texas - Smart has landed himself four long athletes. This is what he has been trying to do, blend athletic four year "system" players with elite talents to carry the offense. If Mitrou-Long can solidify the PG spot, Smart will have the best team he's had since coming to Austin.
Texas Tech - The Red Raiders will take a step back next year, but it looks like it will only be temporary (similar to what Baylor did this year). They should be down next season, but will bounce back in 2019-2020.
West Virginia - The Mountaineers will continue to be a headache. They will trap and press and pressure and generally drive you crazy. The major question is always can they score in the half court. If their offense is reliably efficient in the half court, they will be a top 10 team. If they struggle to score, they will still win a bunch of games because they will make you throw the ball all over the gym.
The Big 12 will be tough again next year, but KU will be loaded. Next year's teams at Texas, TCU, West Virginia and maybe even KSU or Baylor could all give this year's KU squad problems, but they will be facing next season's monster roster.