White will share the load? SB51 game winner aside, he stinks as a runner. Michel will play Sunday? Says who?
The Patriots had 448 rushing attempts last season. Of those, 404 came from running backs...
Dion Lewis: 180 (10 total prior to week 5)
Mike Gillislee: 104 (all but 6 of these came before week 9)
Rex Burkhead: 64 (5 total prior to week 7)
James White: 43
Brandon Bolden: 13
If you figure they'll run about that much this year, we can assume Burkhead will at least account for the Burkhead + Gillislee amount. Michel getting 180 doesn't seem unreasonable even as he's eased back into the lineup, given that Lewis himself didn't exceed 5 carries until week 5 of last season. White's workload seems pretty safe since he's likely to get various draws and they're not averse to running him out of the backfield (contrary to what you said, he looked much improved as a runner last year). And some free agent will account for Bolden's garbage time load without a problem.
And Cordarrelle Patterson will probably actually take some carries away from these players as well since I think they'll be running two or three jet sweeps a game, so figure he'll end up with 20 or so carries on the year.
So you're looking at like a 40/40/20 split between Michel, Burkhead, and everyone else (White, Patterson, free agent).
If you told us after week 1 last season that Gillislee wouldn't play a meaningful down after week 8, people would have freaked out. But, you know.
You need the option for when you need the option. You don't need to option for those times when you don't need the option. That's common sense.
What? This doesn't make any sense. It's like calling Ebner an option at safety and Slater an option at receiver. Bolden was a special teamer and they treated him as such and even when absolutely forced into using him as a running back, they instead decided to exhume Steven Jackson's corpse and convince it to play football. It's not like they're forbidden from signing a free agent and there are plenty of more talented running backs without teams right now, so I don't know why anyone would lament Bolden's loss as a running back. (In kick coverage, it's perhaps lamentable.)