The main reason for the price bump is entirely oriented around Steam's obsession with sales, and I admit it's a bit of a calculated risk.
At $15, I agree we're starting to edge out of impulse buy range, but based on the data we expect most of our purchases to come from deep discount days, and Steam loves to mark things down by as much as 75%. At this markdown, we'd be selling for something like $3.75. If we stuck with the original price, we'd be all the way down to $2.50. So it's more about giving ourselves a bit of a floor rather than raising the ceiling. So while those other games with 3D graphics might make the base price comparison a bit difficult, I expect we'll be more willing to participate in deeper discounts more often than they will.
And we can always bring the total price down later if it turns out to be a huge mistake
I imagine we'll also probably want to try a pay-what-you-want promotion or the like after it's been out for a while and sales start to slow down.
So, the good news is we know everybody like deals and we'll do everything we can to participate in them
@coyot: Working on it. Already fixed the "can't preview locked skills" thing, working on the rest of it. This'll all go into 1.0.36+ and will hit the test server... monday probably. Saturday if I'm lucky.