I'm not a fan of keeping Mudiay. I don't think he plays winning basketball as a point guard. His decision making and style of play, not going to lead a team to the playoffs IMO.
I like Vonleh, I already made a thread about Kornet. People call him slow, but he can shoot the 3, and is able to bring some unicorn qualities. I think he's a great backup to KP next season.
Hardaway is best served as a sixth man off the bench instant offense type of guy on a good team.
I envision it as hopefully becoming a top 9 rotation like this
Randle (Free agent signing, upgrade to Vonleh)
Porzingis
Knox
Frank (Yes give him a shot to start with a healthy KP, stronger Knox and better unselfish team)
Maront or RJ Barrett (If RJ, Frank is the point, if Maront, Frank is the 2)
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Hardaway - first off the bench
Kornet - replaces Porzingis off the bench
Lee - second wing off the bench
Trier - backup point
Probably need to use some cap money to sign a veteran backup point guard, since Trier is not a proven NBA player on a good team.