we got the GL chars and they are some kind of personal raid.
I think, now that most players can clear the raids without the guild, we should get the ability to do those raids alone. No simming and higher rewards if we accomplish it.
Raid tickets can be farmed threw every normal node or per daily activity.
The guild raids will stay or get updated with better rewards and stronger enemies. Similar to the assault battles. "Just" add a new tier to HPIT, HAAT and HSTR raid that is not simable.
Personal raids would result in a better PvE experience and would help with the gear crunch to some degree.
I hope to see it in future. :-)