Someone get Stephen Falken on the line.
I don't think the point was getting your $60 worth. D3 was in "development" for 10 years and it ended up having the main feature ended up being the Real Money Auction House. For the time that Blizzard invested in the game, one would expect more than 4 Act's of similar looking tilesets and models. I've only played through 2.5 Acts of Torchlight 2 and I'm pretty sure I've seen at least twice the models that D3 had. I was able to sell $40 worth of gear on the RMAH to at least get some of my money back on D3.