Master Cariati and I were working together on Wednesday, Thursday and Friday for about 6 hours each day going over every single detail of every single technique we could find in the 15 volume encyclopedia.  At some point one of us commented that General Choi created Taekwon-Do (with help from many people) but he is now gone.  He had stated to us before his demise that it would be up to the seniors around the world to continue developing Taekwon-Do. 
I have heard of some seniors changing things in patterns, altering moves to suit themselves better, and renaming techniques or patterns.  I don't think this is what the General meant.  Taking the reverse turning kick in Juche and changing it to a reverse hook kick for example is not a step forward but simply a selfish act that did not happen when Genral Choi was alive because he said no.  Now that he is gone, he can't say no and the person in charge has no opposition to molding the moves as he wishes. 
Over the 3 days we worked on techniques, Master Cariati and I actually discovered new concepts never before seen in Taekwon-Do.  These concepts broadened the ability to understand how to do moves, making the techniques easier to perform.  Without altering a current technique, without renaming a move, or any other changes we actually added to the body of work that General Choi started.  It was an amazing accomplishment and we were fairly excited and happy to have discovered these new ideas.  We ended up with a full page of notes that will ultimately become standard terms and ideas in the Taekwon-Do community. 
Being a master instructor is certainly more than just wearing a belt.  The Masters are supposed to be the leaders of Taekwon-do.  So we must of course stand up and lead.  Too many masters live on past accomplishments.  Accomplishments usually done as young 2nd, 3rd and 4th degrees.  That was great what you did then, but what have you done lately?...