What should his training have involved, in your opinion?
Also, thumbs up for the Dr. Evil meme.
I think the idea of Kylo killing Snoke is a good one, and I mostly like the execution, but their relationship should have been developed more, which might have involved some training, and unlocking previously hidden powers. It might have been revealed, that Snoke in reality fears Ben Solo’s power, and put measures in place to limit that power. I also think Ben should have grown up, and not still be the emo kid he was in the previous film. His screaming towards Luke felt like regression to me after he seemed quite composed following the death of Snoke.