Maybe it was somewhere deep in the dev notes, but on my Laptop that I am surprised even runs EU4 it would take forever to get a save game to load, in particular the map screen you see before actually starting the save. I found a get around was to hit the HRE map first, for some reason and cursed when I forgot to do that. Now, it's just as fast any way I load it up.
WTG Paradox!
WTG Paradox!