As we all know currently interrupting a spell will lock the caster out of that school for x seconds. Naturally this is a strong anti caster mechanic due to originally all casters had no almost no cds on spells and instead only had mana pools.
The game has changed over the years and blizz adjusted this system slightly introducing double schools for some spells allowing you leeway with it like mindspike being shadowfrost so it did not silence shadow school, but on the other hand big dmg like chaos bolts were locked out of everything (confirmation needed).
Again as time has gone on classes have saw more changes where you are now almost entirely 1 spell school, a fire mage toolkit is 99% fire, shadow is 99% shadow etc etc
Here is where the problem comes in, these interrupts now act as effective silences on 10-15 second cd's, imagine as a melee if casters had 10-15 sec cd disarm.
Now normally i would advicate evening the field a bit with giving disarms to range etc but why not reevaluate the actual problem instead? So here is my suggestion:
Rather than an interrupt locking you out of the ENTIRE school, it puts the interrupted spell on a lockout of its own.
With this you actually make interrupting spells a decision, do i interrupt their heal and let them dmg or vice versa, because right now it's just il try to interrupt anything on cd because it makes them completely useless for the duration.
Discuss