+ Understanding the fretboard semantically as well as spatially + Finger-picking for jazz accompaniment + Triads and triad superimpositions (these are fantastically useful) + Smoother connection of improvised phrases across key centres + More exciting ways of improvising over altered dominants + More chord voicings (this will never end!) + Better techniques for memorising complex changes + Dusting off blues articulation I haven't used for a few years and need for a new project I'm always happy to share experiences if any of this stuff interests you.

Playing with ideas for triad substitution over the changes Cmaj7 E7 D-7 G7.