We could do a hell of a lot worse than Rose, although he doesn't strike me as someone that would just join as an interim.
As a permanent option he'd be...ok? Clearly a competent coach and won Leipzig their first every trophy. Plays pretty decent stuff, but also never seems to last too long or hit the heights that people thought he would when he was being hyped as the next Klopp/Tuchel. I think he's the 'safe pair of hands' we hoped Frank would be, but not someone that will overperform and build something or do anything too special.
Feel like with Rose we'd be hedging our bets a bit. Could probably give him a 1.5 or 2.5 year contract and if he does well and keeps us up then giving him another season would be fine (unlike with, say, Mason or Keane who we v.likely don't want as our long term manager). But would probably also not break the bank and could part ways in 6-18 months quite naturally if it doesn't work out.