Here's one thing about NXT that I didn't really think of. We've never really seen how HHH/NXT long term books a talent who's now a former champion. Most of the time when a champion loses its because they're off to Raw, so they never show up on NXT again or only get one or two more matches before saying farewell. I'd really like to see an NXT champ stick around for like 6 months after losing a title just to see how Hunter books them.
Big E went to the main roster in December and stayed as NXT champ until the following summer. But I don't think any NXT champ has stuck around for long after losing it. Neville is the longest so far, and he seems nearly done.