Seems to me many of us are expecting a relatively rich game with a lot of features that take time to develop. Also I've seen many warnings about possible bugs and a rough-edged final product.
I believe it's best to wait for a great final product and I think that April 2014 is a very short deadline to implement the features a game like this should have now that 10 years have passed since the last great isometric cRPG from these guys. Add-ons are ok, but they usually feel insufficient.
I think the deadline should be flexible if Obsidian reaches the budget of a large scale cRPG. I also think some of the stretch goals beyond 2.4million (or more, depending on the stretch goals already set) should be based on the most voted/replied topics of this forum. The base funding has already been reached, and there are already a lot of interesting and relevant polls that I hope Obsidian will address to.