I think stave+tab would be ideal. What little guitar I've picked up has actually been stave notation, but I've got a lot of missing chords in my knowledge base- having the tab right there by the notes/chords would help me master new chords...
That's also on the roadmap. Right now FATpick renders chords just like any other set of notes in tablature, which is less than ideal once you have much experience with playing chords at all.
