Campaign took longer to start than normal, after a hard drive failure, but it has been going a full month now and the players have invested in the Opportunistic Mercenaries group talent, refluffed as Monster Slayers. They really enjoy the unity mechanic and the roleplaying opportunities it offers. I've told them what else you're working on and they seem most interested in IV and V. I already have a homebrew system in place for something like your potions, but aimed more at recovery (We have homebrew recovery rules, healing is much slower than RAW), otherwise they'd probably be interested in your potion compendium as well.
That is awesome to hear, I wish you the best with the campaign. I know compendium II (Group talents) need some re-balancing. I am also very sorry for not being able to continue the compendiums, of varying reasons, one being the pandemic, another being that my group took a break from Forbidden Lands to play some D&D. That is all i takes for me to forget what I was supposed to to here. I might continue one of the compendiums I have, but I will inform later.
Again sorry for not being able to present the rest of the compendiums. Life happens, shit too!
stay sharp fellow Ravenlanders.