This trend of people who find that they have no "time" to DPS even as SCH referencing CT content is really strange. Again, they must have either the worst parties ever on a regular basis or are watching the HP bars of the entire raid, which usually means massive overhealing and wasted time. If another alliance is obviously struggling, sure, throw them a hand here and there, but otherwise you have to trust that their own healers will do their jobs. If the other healers (or their party members) are so terrible,let them sort it out so that the show can go on. Regardless, no other content in the game works this way, so it's not really a good benchmark for any role's performance.

Anyway, yes, obviously AST will have some way to DPS. My guess is that their DPS spells will be tied into their barrier stance unless the new Jobs are allowed cross-class skills from the existing system (i.e. they get access to Cleric Stance).

If the former turns out to be the case, it will be interesting since it would mean that AST could possibly DPS quite effectively while throwing out great mitigation, but they wouldn't be able to rapidly stance dance with healing like SCH and WHM can now (given that Yoshi hinted that there will be a long-ish cooldown on changing between tsukiyomi and hoshiyomi). I guess we'll find out in the near future how this really works.