Cornucopia:
Sweet set, no lie.
That's for sure!
I will say that I'm very glad Woodcutter is in the base set: having no sources of +Buy under $5 would be pretty bad IMO. I could see swapping out Spy: I like the card just fine, but it feels like it belongs in Intrigue instead, where it can combo with Swindler/Saboteur, help set off Conspirators, that sort of thing.
I'm fine with Saboteur: it's good to have a couple of those sorts of cards, and I like that it looks scary but isn't very good (except when it is!). I'm also very happy with Bridge and Coppersmith being Throne/Kingable, and I'd say Coppersmith in particular needs that to be good enough often enough.
Yeah, I wouldn't mind an IGG that just had $1 on top. But that's because IGG is my least favorite card in the Dominion universe by a long shot. So anything to knock it down a peg.
In general I'm fine with Hinterlands' complexity, though.