I think even if this campaign doesn't fund, the project will be back around. If you look at the Mannerhouse blog they have a tremendous amount of work already invested and even have the first sprue tooled. If they could come back and make a different base set work for the $50K they received on this pass I'd certainly take a serious look.
After making time to read through many of the comments, I see two two design decisions that seem to have been a miscalculation.
First the decision to put walls and floors on the same sprues really locked in the set make up early on that then can't be easily changed. If they'd put floors and walls on separate sprues they could have changed some of the ratios that some of the commentors were chaffing over.
Second, the plan to include sewers in the base set instead of the stairs and wooden platforms seems to have been a miss with many people.
On the separate topic of value, I think it compare's favorably against the initial bundles from Dwarven Forge, but fairs poorly with where the DF bundles finished up thanks to their breaking many, many stretch goals. Had this project reached a million dollars I'm sure it would have added enough to look like a better deal as well.