just completing several test-run campaign (with several autoresolve and auto_win though), in the campaign map, with standard BI units, as CW allready give me that, here's my impression about the upcoming campaign difficulty:

1) Aceh : HARD
- While Melaka usually overrun by Portuguese Horde relatively soon, their posessions in Riau actually give me some headache, even when they start out as ally, melayu kingdoms did historically at war with aceh soon, and as you can expect, attack me pretty soon and I was forced to move south, rather than repelling portuguese from Malaysia. After Portuguese got entire malaysia, they also sent their troops overseas to invade my land too, while religion is not yet a big part (we didn't made the trait system yet, just use defalut BI), that north Sumateran province (that CW made so Sriwijaya is their faction creator, not aceh or melaka, because of the Paganism there) often gave me big headache since they tend to rebel, and have a lot of hindu buddhist provinces there, occupying riau and west sumatera is easier because of Islam, and Sriwijaya outgrow the Palembang, and put the later to early death (well, sword heerbann vs keels is not a good idea u know), pajajaran gulp entire Java and put Demak and Majapahit to flight (they are still horde faction, thanks to wolf's laziness).

2) Melaka : INSANE
- having a horde in front of your very2 door is really annoying, especially if that horde had chosen axemen and horde chosen warriors, and you must use only hillmen and berber axemen to hold yourself (bah, hope the new units won't doing that stupid things). Anyway, even when Portuguese are repelled from their initial settlements, actually their numbers increase, and I decide to let them occupy johor to give me some peace. in Riau fronts, Aceh, Sriwijaya and Palembang ganged up and attack my possesions, and can't expand much (but partially because of that crappy "berber" units that can't hold clibnarii spams the acehnese produce, and fight against sword heerbann and hearth troops is tad difficult. yeah, long story short, melaka's position is very dangerous one, and thanks to CW's weird ring of hatred, everybody hate everybody more now... and well, once again, Pajajaran gulp entire Java.

3) Pajajaran : TOO EASY
- heck, I think I'd got the hardest historical campaign, but actually, Pajajaran's postion in this darn map is the best one, your immediate enemies are interlocked with each other (demak vs majapahit, and in sumatera sriwijaya vs palembang), it was really quick and boring blitz against those romano british legionaries too, occupying java was a piece of crap, and I own north sumatera (!!!) rather very2 quickly, only aceh grows big, and that's all, too easy campaign...

4) Demak : INSANE
- pressed on two fronts, having only slaves and virgins to hold your line (WHERE ARE THE BOSOPHORAN INFANTRY WOLF?), and well, I resort to mounted archery tactics, but that was still hard to hold out the hun 66 cavalry army, and pajajaran's vandal raider spam. In sumatera, Aceh grows into really big empire, and even kick portuguese out of Malaysia (and melaka remnants too), to this point, I was simply sandwiched and barely hold Central Java... really - really insane postion....

that's all I should report... (made Pajajaran's Postion more perilous!!!)