No, Actually, It’s Usually Not (& You’re Misusing the Word)
In the interests of stamping out an annoying new phrase before it takes hold any more widely, here’s my 2 cents on the proliferating use of the phrase “It’s Genius!” to confer a compliment.
First of all, you’re contorting into an adjective what is meant to be a noun (hope I’ve got the construction right on that — but you know what I mean).
Second, what you’re referring to as “genius” is usually just clever (if that).
Third, there’s already a perfectly serviceable, existing phrase for the genuinely brilliant insight or idea.
Namely, “What a brilliant [insight or idea]!!”