I'm still short one building character (haven't gotten around to creating it...), but as of now all four of my current building characters have their manufacturing slots full. The blueprint sets I chose seem to be working out pretty well; it's been slightly bumpy, but components are finishing before the hull blueprints come available, and 12 out of 13 current in hull blueprints are currently building hulls. I'm still short one archon, 1 nidhoggur, and one drone bay blueprint from my goal blueprint set, but I expect those to be taken care of within the next few weeks.
Also, the station I'm building in currently has wait times on manufacturing slots. This was expected; my goal is to drive the other builders away.
Unfortunately, with the mackinaw buff it looks like there might be rough times ahead for manufacturing. If low-ends follow the example of isotopes at all, they could be in for a dramatic drop in the near future. I currently have 56 billion isk of minerals-and-things-made-out-of-minerals in my manufacturing process, so that could end up sucking. It may be necessary to put a hold on buying minerals for a while.
On a related note, profits since minerals went up have been substantially higher than pre-inferno. If they drop back down, I might expect profits to return to that baseline as well. Which will also suck.