Hey!
From my experience of using Guitar Wisdom I would recommend some form of a library section for the subscribed users. I do not mean "lesson notes" (although a cheatsheet from Tomo of what he deems "cheatsheet-worthy" would, undoubtably, be AWESOME). Rather a catalogue of all the practise routines and variations thereof.
I realised the need after having to rewatch videos x 3, looking for the details of practise licks that were too elaborate to note down. It might even be cool to put the material with its relevant video.
Just a thought. Other than that, love your work.