Made a small addendum for you.
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Having adds that require off tanking does not make a fight intricate or interesting, it just gives the extra tanks something semi-worthwhile to do with their time.
And I have to disagree entirely. Every ST boss has more mechanics 'individually' then the entirety of the LotA bosses combined. Nearly the entire CT1 raid was tank and spank, with the Giant knight boss being the only exception. The last boss at least made people move around, but even still...
While i agree that having more tanks in CT2 would be pointless for the face-roll content that you're facing...
There's only room for 3 tanks for every 15 DPS and 6 Healers. According to the last survey done the amount of tanks make up 1/4 (or 6/24) of the players, healers 1/4 (6/24) and dps 2/4 (12/24). There's no reason why SE should make content available to only HALF of the tanks (3/24) that want to join, all of the healers (6/24) and 25% more DPS (15/24).
It's frustrating to queue up for and only drives more tanks away from this game. We dont need that.
Roll a DPS. :P
You don't even need 3 tanks for ST. Due to ilvl, pretty much every run I've done of it has been done with a single tank.
That survey isn't perfect. Typical queue times indicate a much different situation. If people were queuing at that ratio there'd be minimal wait times but as it stands DPS have a much longer wait, meaning the queues are typically much more than 50% DPS.