RPAs have a specific mission they are very good at, loiter forever, track asshole x, kill asshole x without taking out the entire city block, in a permissive environment . Occasionally they execute other mission sets like CSAR, CAS, etc, and the community has evolved so much in 10 years with new TTPs and toys it generally goes well.
Couple major issues with RPAs for this mission. They can’t land anywhere. You need a GCS, and some solutions are out there for quick site set up, but what happens when FARP site A gets rained out at the last minute and you have to flex to B. Man power ain’t there to support having alternates, and tearing down and putting up the infrastructure is a couple day project.
Comms. If you flown in the stack with a RPA you appreciate why you don’t want them to be TAC-A. Their radios suck, a lot of lag, only 1 or 2. Most of this is limited by current SATCOM limitations.
Lost link. Happens more frequently than most probably know, Do you really want your light attack aircraft getting a 9 line for CAS and then loose satcom link rendering it useless?
I’ve spent a assignment in RPAs. The are a great tool, lethal as Fuck when employed correctly, I really don’t think they are a great answer for light attack, at least where we are with current technology. Get a king air or light turbo type aircraft, strap some cameras, as many PGMs as you can hold and some data links and call it day.