That’s a pretty creative placement for that line! That definitely might be something worth fiddling around with more.

Yeah, I don’t think that ‘training’ line is particularly necessary at the end of the film. While I think his training in TLJ is more about Kylo’s resolve more than his abilities, regardless of that Snoke doesn’t really have to mention the ‘training’ bit in TFA. It doesn’t mean Snoke isn’t manipulating Kylo’s emotions in order to train him in TLJ, but again, we don’t need TFA to really set up that.