I think part of the reason that the game has a lack of interaction between commanders is the lack of player groups. I love this game with or without player groups. I think having in game player group would add a whole new flavour to the game.
Caliber_az
Might very well add flavour to the game, but like most flavours, while some might like it, many will find it distasteful. I, for one, would only find player groups/guilds acceptable if we're just talking things like guild chat, grouping and maybe, just maybe, a guild 'home' on an NPC base (note, not guild owned base). If it were to go down the path of group/guild ownership of in-game assets like bases or territory, then that's going down I path I don't want, so I, for one, would find it distasteful and it would be bye-bye open as far as I'm concerned.