I believe you were missing Grant Williams on your roster, so we’re at 12 with Kornet.
I would say you want 13 players you’d be somewhat comfortable with playing regular rotation minutes due to injury, rest, etc. Most coaches play 9-10 guys in standard regular season rotation, so 13 gives you a 3rd layer of depth at Guard, Forward, and Big. And I think you’d want at least 10 guys you’d be comfortable turning to in the playoffs. Most coaches run an 8-man rotation in the playoffs, so 10 gives you some matchup options or the ability to withstand injury.
I would say we have 10 players I’d be comfortable turning to in the playoffs (Tatum, Brown, Smart, Al, Rob, Brogdon, White, Gallo, Grant, Pritchard). I’d add Hauser as an 11th that I would not be comfortable yet relying on in the playoffs, but I wouldn’t mind turning to him in the regular season.
Spots 11-13 should be 3rd string guys who are not in your rotation, but you feel you can turn to if necessary. To me, you want 1 guard there, 1 forward/wing type, and one big. I’m willing to count Hauser as our 3rd string forward type. I don’t think we have a 3rd string C on the roster. Technically, we don’t have that 3rd string G either, but Smart, White, and Brogdon have so much size and versatility it probably doesn’t matter.
That means I’d be willing to use spots 14 and 15 and the 2-way slots purely for developmental purposes. I’d agree that Kornet is basically a wasted spot, but hopefully he’s a wasted spot as the 14th man and not being relied on as that 3rd string big.