A $2m goal is awfully small. I think Sony should have been a bit bolder and gone for a goal of at least $10m.
Looking at the budget of some other games
here, $2m would only just cover the recap videos!
The first Yakuza cost $21m and the first Shenmue was $47m. Obviously I don't see them spend that much again knowing that it didn't make the money back the first time. Plus I expect them to keep development simple to make a pretty basic game technically so they don't blow the budget and put more emphasis on the story itself.
But I'm sure there's lots of fans out there who would have given a lot more. For example I would have paid around $50 for a digital copy. I didn't back the $60 cause I have no use for a physical PC copy.