So I guess groups that skipped phase 2 would be considered exploiters too as well right? What about the groups that are able to kill Miser's Mistress before she even moves rendering the majority of that encounter pointless? Or players that used certain abilities/return to territory to solo NMs back in the days? All this is just players making note of encounters and adjusting to the AI. Yoshi did acknowledge that this was oversight but at the same time commended the players for being able to do such a thing.
At the end of the day, this is good for the general populace since it allows the devs to adjust to the players ingenuity and hopefully create better encounters where the enemy AI isn't so easily abused.