Personally the internal power cable not begin sleeved isn't a huge issue; it's not like it's really visible when the case is assembled.
Even if it's unlikely to happen with the production versions, it's really great seeing you guys are testing things and making sure they work before doing mass...
The mount plate colliding with components on the underside doesn't seem to be an issue any longer; I bought a C7 last week and it included a pack of short screws with rubber/plastic stoppers; specifically to be used as an alternative to the bulky mount plate on ITX boards.
Really looking...