So, Interject...mostly useless?

[IntrovertAnt]

I admit, I thought interject was going to have more play than what i'm currently finding.

I feel its mostly useless at this stage in the game (though future raids pending of course) for these three reasons:

1. I'm struggling to think of a boss that has a move that can be interjected
2. Most mobs that have a move that can be interjected can also be stunned to the same effect of canceling the move.
3. A good amount of trash mobs that have a move that can be interjected have such a fast cast time that it's almost impossible to catch the spell to interject it (example, the fire doom walls in the Hell's Lid).

What do you all think?