I am using water main, and I can see your reasons behind this topic, but honestly there are many ninja (beside main characters) who are strong enough to decide the sort of a battle (I saw skills that can interrupt an entire field), for this reason I think that for every change the Oasis can do, there will always be another "unbeatable" team around.

With Immobile debuff and with all the new immune ninja you c*ways defeat healers, for every ability there is something to counter it.