Well we went back and forth a bit on For Greater Glory, personally I didn't quite agree that it's a good card for bad players. But I can see the broader point that it's tempting to try and hold out for insane value from it whichis a trap. Using it even if it's just 1 fate return is still usually worth it.
Definitely agree completely about the core set and the subthemes - I'm very curious to see how, as the game develops, the need to play balanced vs focused evolves. At the moment you need to be balanced if only be deckbuilding necessities, but there's going to be a lot of variance depending on how you draw. The GenCon single box tourney will be massively so.