We saw some nations practically eliminated early in this first MP testrun.
Savoy & Union of Kalmar are basically out of it, and they had lots of details and stuff for them.
I think giving Köln, Swabia, Languedoc, the Iberians and others events and leaders will give them the possibility to be vital powers.
IMHO, an MP game of Aberration should start with 16-20 players, and let people that get eliminated dissappear or moved to the next viable nation. This creates a more cutthroat playing atmosphere, and no nations get "artificial injections" like in vanilla game where you HAVE to have a France, a Spain and an England.