Neville and Calisto would make awesome additions to a Cruiserweight division!
A big reason that I think Neville is not doing too well on the main roster is that he's always wrestling guys that are a completely different style. If a Cruiserweight division would start he could really shine in a high-flying match I believe.
This would give quite a few of the wrestlers a new purpose and won't make the roster feel so crammed I believe.
Also, I was gonna say Cruiserweight Championship and Hardcore Championship but I know that with the PG-era the Hardcore Championship is just unrealistic.