If you are going to say "better with synergy", I think you need to state what that synergy is.
Ditto for "better with certain opponents". (While this one may seem obvious, its not always obvious for example if a particular faction/tech combination is going to field enough Mechanical units to be worth considering.)
I like that idea. I know that I wrote out some of the synergies, and I think I cover what those synergies are in each of the videos that I have planned (at least I try to). I have started to attach my notes on each set of doctrines at the end of my original post, most of which I actually wrote back before the tyrannosaurus update.
I think I will post the notes for the corresponding tier list when a video goes up on my youtube channel. For example, I just posted my dvar doctrine tier list, and put my notes on those doctrines in this thread about 20 minutes ago.
I think I will try to clarify any of the doctrine that are still a bit vague once all of them have been posted. I got a a couple very busy weeks over the next few weeks.