Seems so strange to have a designer recommending house rules. Do you have any you recommend for your other published games?
In this case, it's because the expansion rulebook is lacking. It doesn't cover the case, and then you look at the main set rulebook and come to a conclusion that is not actually how I played the ability.
Infiltration: They changed the game a lot from how I had it. I recommend playing with all of the optional rules; that at least gets you closer.
Nefarious: I recommend the second edition; the card mix is just slightly different, and a guy on research is free. Fixes due to the wisdom of my years. If you have the Ascora Games edition and aren't planning on getting the expansion, which should be showing up soon, then don't play those two Twists together that make the game unwinnable.
Greed: One card is wrong (a mistake I didn't catch). It's correct in the prototype and I haven't changed it to match. It's going to be hard to fix, I mean I guess you could sharpie it, if I told you what it was. No-one has noticed and well it's a drafting game; this particular mistake does not matter much.
Pina Pirata: The second uh printing is better. They added in the "Adventure mode" (I always play "Cruise mode") and made it less bad in the second printing. And the cards are much more uh readable, distinguishable, due to color, although still not as good as the prototype. And the tile mix is a little less harsh. I'm not sure how to tell the boxes apart. With the first printing, do not play Adventure mode.
Gauntlet of Fools: I think I blew it on Armorer; it's not especially strong, but you can get lucky and end up going through the entire deck of monsters. Uh my temporary fix is, don't play with that one.
Kingdom Builder: I think I basically play by the rules. Where the expansions are off, I play by the prototype; Crossroads-the-ability gets you any terrain if you have two of the same terrain, and this Canoe business. And many things have better names.
Dominion: The prototype doesn't support 6 players. I don't play with the removed cards, or Rebuild.
Temporum: Use the "Play or draw or score" zones sparingly; with new players, don't use them. If I had it to do again they'd be in the expansion, and some expansion stuff would replace them in the main set.
Monster Factory: I think I may actually play this by the rules.