They might of changed, but they gave crap rewards. They gave you tokens to buy stuff for your planar engines. Otherwise they were useless, though there were some uber rare mounts and stuff. But the problem was that you would do one invasion, go back to town, wait 15 minutes or so, then do another one. They implemented so that there was only one zone event going on at any given time. That shit should of been constant.
Anyway they should of rewarded better gear and they should of made events that dropped raid-level stuff too. They should of ignored most of the PVP and raid development and just focused on making raid systems better.
The raid rifts were very cool too and there was a lot of fun with PVP and them. They made them so much of a pain in the ass to just open because you had to farm a lot for them. Meh.