Is the purpose of multipool to mine other coins and pay out with QBC? That process could increase the value of QBC.
I think QBC needs more direct mining hash to secure it. If we can find some use of QBC, eg buying syrup with it, then the price of QBC will rise, that, in turn, will attract more hashing to secure the coin.
So, the first priority is the usage of the coin.
If it's just a SHA-256 multipool then it will just harness ASIC power that wouldn't be hashing on the QBC blockchain anyways so would be a great idea, once Scrypt ASICs are larger and the majority of hash on Scrypt coins it would make sense to add Scrypt to the multipool, I would be hesitant to add scrypt to a multipool too soon as it could take away miners from the QBC blockchain.