Might I suggest:
- Guild wars on all P99 servers that let a level 60 fight a level 1(and all levels in between) in the opposing guild everywhere across all zones if their guild is at war with another - Could throw in money loot and possibly 1 item loot for extra fun/hijynx
- A few days or more every month at a random interval(unexpected), several major raid zones are flagged PVP to everyone in them (and allow level 1s to PVP w level 60s) - Do this also on all P99 servers. Please do this right after a quake for more fun - but wait 20+ minutes to flag everyone in those raid zones PVP
I'm a little surprised no guild wars seem to exist? I say that because how often guild squabbles seem to be fought with annoying/less entertaining things like petitionquest and lawyerquest.