For my part, I don't really have an opinion on the matter. I supported the project, but I have no real issue with the delays ("Do you want the job done right, or do you want it done fast?"). And I don't have an opinion on the "empty space" thing because I haven't read the digital materials Autarch has been releasing, mostly because I've just been that busy.
Anyway, this is humorous because I received several parcels on Monday. One was a blotter pad of graph paper so I can start sketching the first few levels of my Carcosan megadungeon. Another was a miniature of a Kolyarut (here's the D&D 3.x version and the Pathfinder version) whom I plan on using to represent a Planar Trade Consortium agent with business regarding that very same megadungeon. Finally, my copies of Barrowmaze I and II arrived that very same day. I haven't had the chance to read through them yet, but still, megadungeons.