What do you guys think is the cause of severe lack of Tank users?

[aodhan_ofinnegain]

But that's the thing. We had two AoE actions. Now we have one AoE action across two buttons.

Or, to put it another way, you had two possible decisions, and now you have one. You had choices between defensive vs. offensive benefit. Now your choices are... none.

How is using two buttons to perform the same action, with all decision-making beyond "Are there 2/3+ enemies?" removed, less braindead than having actual decisions available, even each only takes a single button to perform its function?

There was never a decision in AoE for tanks like you are making it out be, you had no aggro tied to Total Eclipse, you had to Flash to get an aggro lead, which eventually blind effect was diminished, you only used unleash for initial grab, because the potency was so bad, then you pretty much TBN for gauge so you could quietus for more mp to fuel AD spam and steel cyclone vs decimate was usually a comfort choice more than a mitigation vs damage choice.