I'm going on the record...
I think he should keep starting all year.
In the absence of any unknown information or any injury I say let him keep going, limit innings in any lopsided games and keep him in the rotation for the playoffs too. Try to keep the total innings as reasonable as you can.
He's arguably our best starter and he seems fine.
The bullpen is much improved and seems fine without him in it
There's no guarantee he won't get worn down or injured if he pitches stressful innings out of the pen
This is a rare year to win and could be our last realistic GOOD chance for a while.
F'n go for it.