Not sure what 'serious issues' you allude to. Let's arrive at grand, sweeping conclusions based on a few training camp vids, shall we?
While I have my concerns about BW, I prefer to watch actual game performance before forming an opinion.
As for 'how did that work out' for Kizer, I would say exceptionally well. He is 22, he's made $2.2M, and could make $2.7M over the next three years. He is battling to backup one of the all-time great QBs. We should all have his problems.