When comparing the Lair with the Monster Compendium most of the monsters are conceptually the same.  Bat Swarm, however, is a bit unaligned.  Health and Defense are reversed for example.  Was this modification on purpose to adjust for the scenario or simply a clerical error?  If error, which is your intended version?

Hey Greymark, the entry in Lair of the Mutant is the correct one (DEF 10 | HLT 15). Intention is for the swarm to represent many creatures so not too difficult to make contact with something but you are only taking out one bat at a time (with the 1 damage maximum as you kill an individual bat with each hit).

How far are you through reading/reviewing the books? The clarification questions have been very helpful in highlighting a few areas to edit and I will likely update the pdf's in the near future but may as well wait until you've posted all your questions first and deal with these all in one go, no pressure of course.

Currently I am in the process of converting your system (with a focus on LoM - which is still a significant amount of data) into a relational dataset for my game so a lot of this falls out through that process (I also happen to be a decent proofreader so I may be noticing details that others don't).  My recommendation is to start updating the pdf's but keep a log of the last update date per document.  I will keep adding to my main threads.  If you check them by date periodically you will know what's new.  And when you're comfortable you have enough then issue an updated version.  Honestly, I have held off posting everything I noticed, focusing on the most significant items as I was worried you would find the questions/info annoying.  I will go all in.  That said, I would give it a few weeks.  I certainly won't get to everything but I do have the luxury of deciding what to focus on so I will make this aspect a priority.  If necessary, you can PM on the reddit account, I sent you a PM with my username there.

I just finished the Ant Queen.  Note that in LoM you indicate her size is 'Huge' but if I am not mistaken in most references, such as the tables in the Monster Compendium you don't have a 'Huge' category. You go from 'Large' to 'Colossal'.  For example:

Monster Harvest Size Table

Size Number of Parts Harvested

Tiny 0.5

Small 1

Medium 1

Large 2

Colossal 4

Personally, and maybe this was your intent, I think you should have Huge between Large and Colossal.  There is room there I believe.  Paizo, for example, has Huge and Gargantuan in between Large and Colossal.   It seems off to me that if an Ogre's category is Large that there is nothing in between an Ogre and all other bigger creatures.  Of course, just my two cents.  I will plan to add at least Huge to my game (assuming it proves to be a good fit as I work through other monsters).  Intuitively, I think it should.

Similarly, LoM lists Bats, Swarm as 'Mammal, Flying, Small' (which I believe is correct) but HoA - Monsters lists it as 'Mammal, Flying, Swarm'

Sorry I missed this message previously. Feel free to keep sending over any feedback if you wish (no obligation of course). If you PM me on reddit I can send you my email address if thats easier. (Can you remind me of your reddit username as I have several messages from people there and not sure which one is you?). 

Out of interest, what's your end objective with your work and the HoA system? I'm curious and excited to see what you're doing with it.

I will PM you on reddit and make a new post on what I am doing.