It took six months of work, but version 1.4 is finally out!
I finally dedicated some time to improve the appearance of the document; the whole text has been thoroughly revised and updated with numerous grammar corrections and wording changes. This is our largest and most polished version so far!
Numerous adjustments and modifications have been implemented. Several obscurities and imprecisions have been clarified and complemented with our house rules; some entirely new mechanics have been implemented as well. The updates are listed and detailed in the attached document.
Even if this is not your type of variant, some (or all) of the house rules included may considerably improve a game of Advanced HeroQuest. I hope that they can be of some use.