Much much better actually would be the option to create and disband 'mini guilds'
If two people want to work together to own keeps and earn amulets etc.
Limitations could include: no HP regen, no SR, no guild hall, no guild level, no aura, no guild banking etc, limit number of member to 5
Just on the fly, pvp generating alliances
Best effect if it was an automated process eg through an NPC in a fancy newport Registrar Office