Rachel and Jean need to have a good bonding moment, like in Excalibur or at the wedding or Apocalypse's future. But I would prefer them not to be on a team together. Neither one would get the proper ability to shine. If / when Jean does come back, I wouldn't mind seeing her run a branch of the X-Men and Rachel working with her (in a Professor X to Scott/Jean relationship circa Gold and Blue Era).
I'm still annoyed that Rachel will not be present for any part of Second Coming. Especially if anything happens to Scott or Cable during it. But I guess this isn't a story worth bringing them back for.