Kudos to you GB for having the courage to not play the whole guitar all the time.
The way I see it - or 'hear' it - is; in a country or rock outfit you've got probably two guitars and a bass, or, guitar, mando and bass, or, guitar, fiddle and bass,or whatever. That's at least 14 separate strings. Instead of sounding like a big mush of overlapping out of tune 3rds, why not utilize each instrument for part of the chord hence making one big G chord within the entire band. That's just one area where the genius of so many great country groups both old and new lies. They know how to arrange. Jimmy Page did it, the Byrds, Allison Krause, even Keith Urban does it (re:the modern Nashville thread in 'bad dog'). Sometimes all you need is two notes. If you play two notes and the mando player gets two, bass takes one and then there's a melody on top of all that, there's more than enough harmonic information to make some big chords. Angus and Malcolm young are a marvelous example of how you can play 6 or 7 notes between two guitar players and sound bigger than anybody.