Biggest complaint about MTW and its about Rebels.

[Budwise]

I think when rebels rebel they should become a new faction. Like with a civil war it should be now two factions instead of the loyal being the real faction and the rest rebels. They should work as a nation instead of individual nations that share a border.

Plus a few more ideas about rebels.
1. Do they invade to take over more provinces? I forgot but if not they should.
2. Your nation should be able to faction re-emerge later if you lose. Maybe fast forward the map so many years and start off with no money but that would be cool to start with nothing but a buttload of troops.
3. A little advanced but if your country has a high happiness and the neighboring faction is dreadful and miserable, you should once in a while be able to invade and have the troops and population welcome and join you instead of fighting against you. That has actually happened in real life and that would be an all new way of playing the game if you could do it here.

[Ciaran]

Generally good ideas, especially the third one. Economic spill-over, it would make sense.
As for point one, yes, rebels attack neighbouring provinces if they consider themselves strong enough. I once lost my main troop producing province to a rebel force because I didn´t expect them to invade and therefore kept no more than one peasant unit as garrison.
As far as I know rebels don´t attack each other, but they don´t coordinate as well. Maybe "Rebel" is the wrong term, they´re more like regional independent lords.

[tigger_on_vrb]

In my experience the rebels do sometimes attack a neighbouring province, but its pretty rare. I agree it should happen more frequently.

[rvg]

In my experience the rebels do sometimes attack a neighbouring province, but its pretty rare. I agree it should happen more frequently.

I see them build infrastructure, troops, and attack all the time. If Poles aren't aggressive enough in the beginning, both Prussia and Lithuania tend to build up huge rebel armies and repel any attempts to conquer them or any adjacent rebel provinces.

Same reason why on Expert I hardly ever se Novgorod expand anywhere except Finland. In fact, they often get crushed by the rebels and cornered into finland.

[phred]

Once, when the Golden Horde appeared, I killed the Khan and then withdrew from the battle thinking that the resulting rebels would now be easy to deal with.
Wow, was I wrong. That huge rebel Mongol army was worse than the normal Mongol invasion. They were very aggressive; they split into 3 or so rebel "factions" and were a royal pain to mop up.
But that was a very large Mongol invasion force to start with.

[Knight Templar]

Nice ideas, especially the second one about leading a re-emergency. It would be fun to choose units which will appear with you when you re-emerge.
From my experience, rebels seem to attack my (and other faction's) provinces very rarely.

[antisocialmunky]

You haven't seen the turn times of Master of Orion 2 have you... The problem with massive amounts of individual AI is the fact that the AIs would process exponentially more options and therefore you'd have horrific turn times. Though... I doubt it'd ever get as bad ad MOO2's 10 minutes - 2 hour turn times when you get truely massive amounts of intellegent civilizations.

[NodachiSam]

Those are good ideas and probably things they considered and maybe couldn't implement due to time, money, or processing limits as ASM mentioned. I do agree those ideas are good and they've occured to me too. Knights of Honour has every territory part of a faction even if they are small ones. I only played the demo though.