chubb, maybe. michel, no and harris i don't think so.
chubb would likely have been in similar position last draft, so he didn't necessarily improve except maybe a few spots. he was a top 5-10 back after end of season last year, and he's still top 5-10, so hindsight it's not really a good move, imo. but, he had a chance to go from the #5-6 back last year to the potential top back, which is arguably worth the risk.
michel, though, wasn't in any of the top 10-15 rb mocks i could find at the end of last season (dec/early jan ones). but now he's in almost all top 5-10. definite improvement.
i think harris is in similar position to chubb last year. but i don't see the same amount of returning competitors for the top spot like we did last year (chubb, barkley, guice, scarburough, pettway, maybe a couple more). with love coming back, there's a clear one, and undoubtedly some will emerge, and i'm likely forgetting someone. but by and large, next year doesn't have a plethora of rb's crowding the top. at least i don't see it. so he, imo, has a better chance of moving from a #5-10 rb, to a potentially top 1-2 easier than chubb did last year.