Hey,
I love all of the ideas in here. I may run it with the procedures as written, but I'd really like to use it to go through published modules to replace Scarlet Heroes since this has a much more interesting combat procedure. I did have a couple of questions when looking at possible roadblocks.
With the max possible HP of a boss being 24 in HQ2, should things in a module be converted to HQ2 boss stats if they go over that unless they're meant to be less of a fight and more of a force of nature like the giant in Waking of Willowby Hall?
Similarly, the maximum number of enemies you can encounter at once in HQ2 looks to be 3. Would it be advised that random encounters that have 1d4 - 1d12 Monsters be converted where 1-4 = 1; 5-8 = 2; 9-12 = 3 or similar?
Then there's the multiple damage dice where HQ2 only gives a single 1d6 - 1d12 for each enemy. Something that would normally be classed an Underling that damages for a possible 1-6 may do 2-8 in a module due to them having a 2d4 standard attack. Would this throw the balance off?