Looking at a wiki I've found out the following:
-outfits are what they call guilds and can be split into divisions
-groups of outfits can form an alliance
-outfit leaders and division leaders can voip each other but only outfit leaders can voip across an alliance (not 100% on that)
-outfits have there own tech tree that allows them to specialize (tanks, air, heavy etc) and theres a possibility that divisions can also specialize.
- group boasting leader skills can be researched by anyone.
- outfits can customize their armour and transport colours, patterns etc.
So for organizing the guild for maximum effect, I think it hangs on the if divisions can specialize. If so then its a simple case of creating one division per spec and people moving between them.
If divisions can't spec then an alliance of pcg outfits would work. Or possibly the pcg guild could just blitz the specialties and become master of all.
As for the day to day running, I think just checking who's online and grouping into squads ( combat squads with medics & engineers, scout squad etc) would be the simplest solution.
Just my 2p and to end this wall of text, the class I'm most intrigued by the the max suit.