SE please fix the casting one-hit-automatic-interruption right away please

PvP is so SILLY to casters that I once saw a Summoner sending his Ifrit to harass the BLM and then the team just IGNORED him because our plan was to down the BLM for last (if there was one). The Ifrit just kept its attacks (ocasional stun included) for the BLM to do NOTHING

What about healers? So a SCH or WHM is not even alowed to heal? It was obvious that the healers would be focused. It would already be HARD enough for a WHM, SCH or BLM to do anything in PvP 'cause they'd be focused EVEN IF YOU USED THE NORMAL SYSTEM

Using normal system would already mean that the casting would be hard, because the higher the damage of the skill that hit you, the higher the chances you'll LOSE your casting (not be pushed back on casting, like other games). And then it would be very intelligent and balanced to add a PvP trait to reduce interruptions. It's just ridiculous, so much it's surreal.