We already do have a crew base in CLT. It's located at gate C-12 today, that's the 1630 AA flight to LGA. Tomorrow I think it'll be at B-8, the 1030 AA flight to BOS. The Crew room is located in the main atrium next to the piano, where the rocking chairs are.

I'm guessing the OP watched all the Blue shirts walking by in CLT ( up to 80 now?) and assumed a crew base would follow......yup?