I expect that they will add massive upgrades to the current LFG system. OF what those would be im not sure.
But i sure hope that they arrange something a little more detailed. They have definately gotten a good thing started, It just needs some uprages.
Maybe they will add in a part where on the group leader they can put in what the group needs or already has, or a check box of things commonly used in the instance - LIKE for zul farruk, if someone has the mallet put in the group main, has mallet, or has BRD key, whatever!
I also feel they should add a way to browse the other groups. Not necessarily be able to join groups higher/lower through their system, but make it so people are able to see what all is about to start.
I wanna see what level 60 groups are running while im trying to level my level 50 shaman. :)
But of all those things, I personally am glad that they have changed from the channel. On my server they did start a LFG channel, its not really helping, but at least its there.