First, i would like to see the search group function to work for all raids. They could create some kind of rotation or something to don't have all up at the same time.
Second, there are easy and hard modes for some of the new raids. I would like to see that for all the raids: an "easy" mode (with the original level difficulty) for the story, with the quests and drops they currently have, and a hard mode that bring all the raids to the cap level and add new rewards, etc. This idea would add to the replay value of all raids and would add more options to the end-game content.