I thought it would have been kind of cool, if in either season 2 or hypthetically season 3, the Oracle twins enrolled at Jake's school, and be his classmate. If Nigel can enroll at a human school, so could the Oracles.
It would have made things more interesting, and added an extra challenge for Jake, having to keep their magical orea secret from everyone especially Rotwood if he is still around. I am not saying make them regular characters like Trixie and Spud, just have them there like Nigel.
BTW, even though they didn't enroll in Jake's school, Sara is in the year book in "Being Human."