Get out of here - You think when your butt is in the sh*t you have time to wait for some slow-mover UAV to come provide eyes on the target? Your guys are dead by the time that happens (or you've lost ground and the initiative at best).
CAS is routinely called in at times of opportunity or times of unexpected risk. Waiting on some silly, straw-hole seeing UAV is an absurd notion.
Eyes in the sky, UAVs have without question a needed role and have helped tremendously. But suggesting they are to be used in the emergency role of CAS for us to put bombs on targets is just foolish.