Super intelligence is way more interesting than Human level AIs and I believe your proposal has merit. Where the concern may come is the fact that a super intelligence might be considered God like. It is Omnipotent, Omnipresent and Immortal. Any bad habits a super intelligence learns, and any foreboding it attaches with Humanity, could have a lasting negative effect for us. What do we leave in charge, or more importantly, what do we leave it in charge of?
Everything is rosy whilst super intelligence remains contained, but with all smart things, there will be a need to look outside the box. Will we be prepared for that?
Have we really thought about what we are building and why we are building it?
Is intelligence everything? Or is it just more questions….