what you just described is called "strategy"
are you also going to imply that all CC is OP because it makes you unable to heal?
"oh dear, someone did something that makes it hard for me to do other stuff, THEY ARTE OP! QQQQ"
have they removed priests psychic scream and dispel magic?
does shadow not have silence and psychic horror?
is your arena partner too tunnelvision to think the blue beam of evil should be interrupted?
or should all priests be unbeatable no matter what class they're up against?
(let's not forget, priests have a drain mana as well, the only difference is it does damage as well, or is that not OP?)