Hi there,
Have very much enjoyed all the releases for HoA so far.
In terms of feedback, I wonder if you will add a comprehensive list of abilities somewhere in the book, or maybe for the referee's guide. Could help with looking up rules or building custom characters.
Also, would you consider a random table for level-up as an optional rule? Something between a D10 or D20 table giving a range of benefits between HP, Def, new ability or skill choices or even special benefits like additional damage with preferred weapon or spell. Could be a single general table or a class/role specific one.
Lastly, I hope the way players get to contribute to world building through career backgrounds is staying. The simple prompt to add places to the world map or invent a group or former comrade really helps ease new players into the game.