How would this affect savage statics though?
If groups no longer need two tanks then people who prefer to play tank may have a hard time finding room in a group for them since the savage raid community is already a smaller percentage of the player base. The meta will also severely impact certain tanks if one tank is simply better or easier to manage in certain fights. So one tank might end up meta and then two other tanks get left out....
I mean I remember tanks being upset about Zurvan EX for example since the fight wasn't planned out well enough so that it was possible to not need two tanks so they were having trouble getting groups if I remember correctly anyway.