Your eu4 save is not helpful as you're using a mod I do not have and cannot load your game without it. The conversion log seems well, no errors.
Thing about CK2 to EU4, is that, codewise, it's half the size of EU4 to Vic2 and a third of Vic2 to HoI4. I hacked it from scratch in two weeks while these other projects have been going on for years. This is because the conversion is very simple, there's really not much to it. And outside of some emergency maintenance when EU4 drops new provinces, cultures or mechanics, there's again not much to be actually done. So yeah, sure, I'll support it until EU5 comes out.
Open to suggestions. What would be the suitable combo of eu4 government type / starting reform for that?
That's easy, there's government_map.txt where you can put the title and link to monarchy with autocracy. However, while generally similar, I'm not certain this is truly representative of the Imperial administration. We'll see if Emperor's release bring some new reforms that might match it better.
Those are hard-coded EU4 events. We do not alter them and I'm not keen on changing them until EU4 development stops (eu5 is announced or similar), and then we have very final versions before us - otherwise we risk creating a lot of inconsistencies later on as various DLCs or patches change them (as 1.30 most certainly will with HRE revamp).
I think it's intended to be broken down to a level further than it actually was in CK2. Usually realms are much too consolidated in the CK2 HRE, so the whole business of "electors" and "free cities" becomes pointless. The mod goes out of its way to create them. I would look at the vassals of vassals in your CK2 HRE.
My apologies, I thought I was. I've included my ck2 save and converter log.txt.
You're probably running some mod that messes things up.
