I'd much prefer that they did more stuff on The Rogue Squadron series. In my opinion, those books captured the spirit of Star Wars far more than a lot of the series did. Tim Zahn's Thrawn Trilogy was brilliant and would have made an excellent VII-IX trilogy, but GL probably felt it was going to reflect badly on his own stuff if he allowed someone else to write the fabled last trilogy.
I'll probably still read it anyway, sucker that I am for Star Wars novels...!