I have a 'flaw report'/suggestion about the editor...
So, it is possible to move the corners of a quad's texture relative to the corners of a quad itself. That's awesome. But there is no way to do this exactly, unlike every other setting in a map I can think of that can be adjusted. There's no field listed for it on the corner points, center point, quad layer... the only way to adjust it is inaccurate eye-balling as you adjust it until it looks like its probably correct. What!? Can this please be fixed in 0.7 (or 0.6.4 if that arrives first)? It would be far more useful if mappers could actually see the relative texture displacement in numerical form rather than just a potentially deceiving visual preview.
(I know that the editor is probably getting massively overhauled in 0.7 because the whole thing doesn't follow the KISS principle very well, but this feature is very non-obvious and basically useless in its current form, despite the fact that it could be extremely useful)
Edit: Unfortunately for this to actually be truely useful, quad handling would have to be changed from splitting quads into two triangles to splitting them into four, using the green point as the center on which the four triangles converge. I think this makes more intuitive sense than the current method anyway, but it requires more work on the developer's end...
Edit2: found a case where vanilla editor disagrees strongly with actual in-game on vanilla. Using clipping groups to only show small sections of an image appears to work (with some issues at the edges) in the editor, but the whole image still shows up in the actual game. example map
I've got two FNG maps which are close to ready for public release, hopefully they'll be on the forums soon! Aforementioned maps are on the back burner. Still doing mapping, but have higher priority map projects.
It should never take 45 seconds to download a map for anyone with a decent connection.