In my opinion, the establishment of another Lantern Corps is probably not something that's going through our Illustres' mind right now. He couldn't get another Green Power Battery for Alan but since he knew Alan was hopeful enough (about him and his legacy, primary) he convinced Kalmin to make him a Blue Power Battery and systems to reconfigure the Power Ring Alan already had; that was a commission, probably a one time thing, 'cause I don't think Kalmin is going to make him another and, as he said to Guy once, all the Controllers that knew something about Power Ring technology already attuned themselves to the Orange Central Power Battery and can't make things of other colors.
If Alan gets inspired later on (or Ganthet after he gets some report about Alan and has some time to think about it) to establish the Blue Lantern Corps I'm sure the Illustres will want to help him in anyway possible, but that's already Alan's prerogative (I honestly hope for a space adventure between Alan and Paul, that may give him inspiration).
On the other hand, I don't know if Koriand'r, at this point, could use a Blue Power Ring as well as the Illustres thought before, it depends on how well you think Hope and Desire can synergize. Remember after all that Koriand'r got her soul a bit modified by the Ophidian herself and, even though Paul tried to rectify that and she can still feel the other emotions well enough, she ended up with a stronger connection to the Orange Light at the end of it. Besides that it has been a few months since then, where she has learned to probably be an effective Orange Lantern and although it may not be as bad as before the Central Power Battery got turned on, the Orange Light still affects and her way of thought could have been changed as well; instead of hoping for stuff, she may already be conditioned to want things or to focus her desire to do it herself.