I haven't played PvP as a mystic, but I can fully understand what you're saying. I run into the same weaknesses while soloing. I have posted on the 'mystic' wish list for a decent stun for mystics, and it has been ignored. Casting times are also an issue while soloing, so I feel your pain. Now that every group solo encounter has constant interrupts sometimes even getting a cure off is difficult. I've thought about making a PvP mystic just to see how we stand up to other classes. I suspected the weaknesses I've seen in PVE would carry over there and you've confirmed that.
On the hopeful side...PvP is still very new and I'm sure there's a lot of tweaking to be done yet. I think a lot will depend on SOE's intent for priest classes. If they decide our role is only group and not 1 on 1 then we're stuck with this lame (for soloing) class.
Message Edited by Prismata on 03-07-200602:21 PM