Despite my voiced objection to the meta team i’m voting no.
Nerfing Ubastet is only looking at the smaller picture.
The spell is strong but there are two elements to look at here.
One is without the half mana start there are many methods to counter him while he builds up.
Second, on a fair ground of stat bonuses ubastet usually can’t kill the 2 troops on it’s spell cast alone.
You need a initial damage source to guide him to the target.
I rather cast my eyes on the Divine Protector which does this guiding and at the same generates an insane amount of red and yellow or Divine Ishballa who gives him the quick start.