This is why I don't Kickstart games. You'll likely pay more, wait longer, and in many cases get "exclusive" things that will be also be sold to the general public later on.
But at least you're supporting the designers, I guess?
In theory supporting the designers is the point. People looking for a deal on KS and not getting it are generally looking in the wrong place or not being discriminating enough in their choice of projects to back.
I pre-ordered (and received) DoI from CSI more than 18 months ago for $49.99. It's surprising that the price hasn't really dropped at all.
Since then it's sold out and been reprinted. The 1st printing was available for $40 on sale at one point, but due to scarcity and reprint the price hasn't dropped as one would expect for a game continuously available over the same time period.
$42.99 is a good deal. Personally I'll wait for it to drop lower as it's not a high priority title, but for those really wanting it now might be a good time to get it. CardHaus's normal price is $48.99 FYI.