I just finished Christopher's GF2 course focusing on music theory and think it's a shame to have discontinued it altogether. The only way to even know about it seems to be through Chris himself. I finished GF 1 & 2 with both Anders and Lisa... and still had a lot of questions about music theory because those courses dole out theory in bite sized pieces in anything but a thorough logical progression. In contrast, Christopher's GF2 course lays it all out - each lesson building on the previous lessons with no gaps. It therefore complements the existing GF courses perfectly.
How about making it a highly visible supplement to the core curriculum? I think that would be of great utility to beginners.