Think about this. Timmy's personality and influence we see easily in Leonard, but perhaps some of Jax toughness and tenacity are also there. In his own strange way, Jack may be a major locker room factor, even. A very positive one, at that.
In a short answer, no, he goes nowhere before season's end. Wonder what the heat game would have been like with just Leonard added to the mix. Remember, the Spurs were actually missing FOUR starters and two of their first three subs that game. Take six of any other team's top eight away and .....
Jack's value to this team, much like so many of the others' goes far beyond tangible. Can't see changes that unbalance things between now and playoffs. More likely an expanded role for Baynes and Nando post all star break. Just an old farts $.02.