I have concerns about adding Storr means related to Underwood and staff perceive culture within a vacuum, or that Wisconsin players talk about the team environment being a lot better this year compared to last year, or that every team he's been on has been better after he leaves, but let's focus on Storr's on-court performance.
I would recommend some folks re-visit Storr's Wisconsin stats. There is a rosier-than-reality perception of Storr, with my assumption being that excellent BTT performance and immediate rumors that Illinois was going to add him as a transfer in the offseason. He also has been a negative defensive player at three different stops, including with two coaches that are known for their defensive prowess.
The biggest alarm is he is the first P5 starter I have ever seen that has put up a negative offensive/defensive rating in each season of his career. Quick description: offensive rating is how many points produced over 100 possessions when that player is playing. The reverse applies to defensive rating. It's really hard to put up a single negative season on a good team because you traditionally pile up a ton of excess offense produced points and few defensive points allowed when you play terrible teams. You can look up Illinois' starters from last year, such as Boswell (+8.9) or Tomi (+22.3!) or even Humrichous (+13.1) to see how this is always positive. You can even see a player that was frequently loved or hated at Illinois like Kipper Nichols that had negative offensive/defensive season ratings but was still a career positive (+2.2). So just imagine how many negatives are associated with poor defense and poor team dynamics to put up a negative rating (-2.7) across three different programs.