There has been discussion about the future of RCs before and there are some who think it's too much of a money spinner to move from larger hired venues.
If they make decisions based on money (which it appears that may be one of their primary motivators) then the smart thing to do would be to go case-by-case. For districts (I guess regions, now?) that don't contribute as much at the convention it would be better to split these up and move into assembly halls. For those that are real money makers - keep them in hired venues (greater perceived cost to the R/F and therefore greater contributions) and split up just enough to hide any decline in numbers, but keep the group large enough that people don't question why they don't just use the assembly hall.