Originally Posted by
Mukuku
To be honest, I see problems either way.
Let's say the PLD can counter off an ally. What do you do with 2 MTs in the party? Do both get to counter, meaning that the "OT" PLD would burn a valuable CD on the "MT"? Only one of them gets to counter, meaning that cover either is ignored or overrides the MT's counter? Now you have OTs that would want to "steal" the counter proc not to lose DPS.
What do you do if you don't actually need the defensive? Maybe the ally has already enough survivability. You let the CD sit? That would mean leaving damage on the table by missing the resulting counter.
Basically, IMHO the cardinal sin is tying damage to other stuff. They did that with gap-closers and it led to its own mess. They kind of do that with TBN and it is also its own mess. If they do that with tank CDs, there is no question in my mind they will also create some kind of mess.