I don’t disagree, more centers would help them be more reactive to local conditions and probably help staffing better as well by opening up more options. I think the issue is money.
Consolidated tracons are definitely a good idea but the warning is the AZO project. I think it was GRR(7) AZO(6) LAN(6) and FNT MBS and MKG (5s). They were promised by everyone and their mom to be a 9 and ended up as a middle of the road 8, buoyed only by the sheer volume of their airspace in the traffic count formula, under the current complexity calculations. All consolidation that in the end makes one level 8, and a bunch of 4/5 towers is kind of a let down. People made the move to AZO on the promise of being at a 9. The traffic count stuff goes back to the late 90s and desperately needs revisions. The NAS is a different place now and places aren’t getting the credit they deserve. There also should probably be a level 13, given the wide gulf in 12s.
When they happen, Consolidated tracons should all strive to be a 9 at least to make sense for the workforce. Maybe put language in the contract stipulating that consolidated tracons of 4 or more facilities will be a 9, like how having a tracon makes you a 5 no matter what. Creating more low level 4s and 5s is just another form of a stealth pay cut.