I wonder since when in PS guilds are battling over each other for power?? Maybe you think about another game...
And just so you know, most guilds actually bought their own houses that they uses as headquaters or as houses simply.. depending on guild.
As a guild member I never thought about oocly randomly kill other guilds members. Sound fun, maybe i should try (/end sarcasm)
But i think gathering around same ideals that arent always guildwars is funnier.. helping each other in developping skills, questing, rping. Doesnt that sound more like PS than.. the other game?
And guilds alliance is also possible. As for a game in developpment i think the guild system is good as it is and in the settings of the world. If you are in a guild and doesnt feel comfortable if they use the guild chat for ooc talk.. maybe you arent in the right one. or talk to them about it. Maybe they are likely to rp in it starting now. And most guild i know also help each other with funds, equipment and weapons and other things..