I don't think that solves much. It creates other issues. One of those isn't a MLB player. Another is borderline. the last is your utility guy that plays a subpar outfield. Fill the LF spot long term with your super utility guy and you've now got to fill that spot. All to have Sano on the bench?
Plus, Kepler only has 74 PAs coming into the game. Similar to Sano's situation. I wouldn't mind pushing Kepler a little to see how he reacts. And with how poorly this team is producing, giving a guy like Larnach a shot isn't entirely crazy. Probably a bit premature though.
What is this, the NFL? Nobody need 15 caveats to a rule. If you're on the bag, you're safe (unless another runner is already there). If you're not, you're out. Simple and straightforward. Learn to stay on the bag.