The reason it would make solo-tanking much harder would be that, if aggro is reset when you enter conflag now, the tank would lose Twintania, opening her up to #2 person on the aggro list. And if that person isn't another tank, it would be... bad. So they can't use conflag to hide out from damage/more importantly Death Sentence without letting Twintania loose on the rest of the party. That makes the idea of solo tanking her much harder.
Though, its early still. I would withhold judgement though until personal experience with the new patch/T5 or a few more days of raider reports.
Though, its early still. I would withhold judgement though until personal experience with the new patch/T5 or a few more days of raider reports.