You think only 2 times Semien has played SS has been during Ryu starts. Not a fluke imo. Asking Bo to play 2B here and there is definitely related to not killing Bo's confidence/ego.
Anyways, I hate being pinned to the extremes like I'm totally anti Bo. Just mentioning that he might need to play 2B if he doesn't turn it around isn't crazy.
Bo does not have any past experience playing SS at a high level. He was always pegged as a weak Major League SS by scouts and we can see why so far. Heck, our own management has gone after a few SS over the past few years (Lindor, Simmons) for that reason.
Anyways, Let's go Bo and Lets go Blue Jays! Hope he does turn it around.