I like Grant, but am not sure why he is seeing so many minutes early on. I guess the explanation is that he often used as a Center so when Theis/Time Lord return, he could see his minutes dwindle. 
Maybe, but he was getting rotation minutes when those two were both available, including at the 5; and it’s not like those two need any load-management. 
They’ve been using him in this really intriguing way: he’s the 5 in roughly the second 1/4 of the 4th Quarter - very interesting. Why? 
 I suspect the fact that the team has a 98.3 Defensive Rating with Grant on the floor (2nd only to Daniel Theis' 96.7 among the regulars) has a lot to do with the answer to that question. 
I don’t love that stat, especially not for a 10-game sample, but he’s good enough at team defense that it seems to be reflected there already.
 He's doing a lot of things right that help the team.  He's still a rook.  The shooting will come around.
I’m with you on this. 
My advice to fans, fwiw: don’t get hung up on shooting %s, look at the whole game. 
Btw, I don’t agree with some people on here who like his stroke.