Hey man, i'm finding the brmt to give me a lot of problems. Its true that having set details included for mons is nice, but I honestly hate all the other changes, at least the way they are implemented right now. Earlier with the ORAS version (btw the gen6 ou compendium option doesn't seem to work, at this point i'd rather use the old tool to build gen6 ou/ru) you could very easily add and remove mons.
Btw, how do you feel about set descriptions?
You'd do them like this: "Lopunny-Mega, desc, ..."
Whatever you put as ... could be displayed on the popout when you click on a pokemon.