By the number of people pissed off, TMP's current code /has/ problems. I don't understand why some people are still saying it has not. It is like pissing in the other's complaints, and stating you don't give a crap about them. And a rather large number of people's complaints, btw.
Also, the Devs have already agreed there are problems, and they are looking into them. Further complaining is of no help.
How about we pass to the phase in which we try to suggest way to improve TMP's code, without making it ineffective for its original purpose (to stimulate wars)? My idea would be to remove the military-penalties from TMP, since that is what you really need for making wars, and it won't really make those affected by it any eager to have a real (and thus fun) confrontation.
So:
* Remove all Unit penalties (morale, training, etc.)
* Don't penalize recruiting troops or anything related to the capacity of a realm to wage a war.
* Keep the economic penalties.
* If the realm doesn't go to war, bring war to the realm. Cause peasant rebellions from TMP, this can come in different flavored types: a charismatic commoner prophet is starting an insulting heresy which must be destroyed, peasants no longer consider the local Lord a need to protect them from foreign threats so they decide to take over the region, commoner merchants decide instigating a rebellion to be more profitable than paying for protection taxes since they are no longer afraid, etc.
* Have people evade taxes, banditry increase and corruption flourish during peace time.
* Cause Loyalty and/or Control of provinces to lower due to more bold rebellious groups.
* Hurt those that profit more from the status quo brought by peace: the rich and powerful ones. Have the council members randomly lose h/p because of clerks' corruption scandals due to lowered discipline during peacetime. Have bandits dare to steal part of the fortunes of the rich due to same lowered discipline of the guards, maybe even steal banks. Actually I think this is the most important point, but it will need some thinking to translate it to in-game logic.
