It has a precedent in at least one other game (The Secret World), so I'd like to see it here someday. Perhaps when you queue you could select which jobs you were interested in/capable of and then once a party was matched, it instanced you and automatically changed your job. Or, since it wouldn't know what gear set you wanted to use, the commencement window could pop showing you what job you were selected for. You could then change gear and commence.