I wonder if the new firmware doesn't actually make things a touch sharper after all, maybe comparing HDMI vs new internal is the same but maybe new internal is sharper than old? Fine edges seem to get mosquito noise sort of, maybe part of making it sharper. I need to shoot with the new, rollback and shoot with the old and compare. Maybe they did sharpen it up a bit? It is a different look than the 'raw' though, less fine micrcontrast still and yet maybe more aliasing than old video or the 'raw' video buffer?
EDIT: the artifacts, fine detail shimmer, aliasing and such seem to be something going wrong in Premiere Pro (h.264, High, 5.1, 40Mbs CBR; USM/sharpen/colorista tools) since both the original Ninja recorded files and ones recorded by the 5D3 with new firmware DO NOT have that weird stuff going on. So whatever that is it is definitely not the fault of the 5D3 and/or new firmware.
EDIT: EDIT: well other than in one file where there is some weird black band that pops on and off across a few letters of white text in a weird way on one file, that is on the original
MORE EDITS: actually that weird stuff is in all the files, slight bumps to cam and almost like a bit of 5D2 line skip sorta aliasing jitter, just without sharpenin git wasn't as easy to spot