Hi
I wouldn't put it in terms of pros and cons. I'd say this is a design option. You can have the WLC on the DC and leaving all client traffic on the remote site by using flexconnect.
If you have multiples remote site and you intend to apply some kind of filter on the wifi traffic, then, it is interesting to have all traffic concentrated on the DC.
But if you have limitation on the WAN bandwidth, then maybe it is interesting keep the traffic locally. As I said, the WLC can be installed on the DC anyway.
-If I helped you somehow, please, rate it as useful.-