Your question about continuity is an interesting one, but I'm not sure how to respond to it. But now that we know that SW movies will keep being made, I think certain kinds of closures will be different. That is, maybe a villain is defeated conclusively, but the idea that a particular group like the Sith will never return is less likely to be used. Lucas only came up with that idea because he thought the films were done. But now that they're not, LFL and Disney will want as much leeway as possible moving forward, so I expect the ST mainly to be about explaining how the Sith can return. And perhaps this aspect might connect to the new continuity -- in TCW we may see something new about the Sith that alludes to their possible return in the ST.