Three items I would like to comment on from my current game:

1. The creatures researched in diplomacy tree:

The game would be better if the three tiers provided a random available unit from a pool.  At the least, each unit in the pool would represent an aspect of tactical combat (ex: strong essence, strong defense, ranged damage, strong melee attack, etc.).  Hopefully the pool is expanded to provide a mixture of units that are 'great at one thing, 'good at a couple things', and perhaps 'above average at three things).

You could additionally use the stats and/or tech paths reasearched to 'guide' the random selection, although I personally would prefer absolute randomness.

You could also do the above by spell books if that appeals to you.

2. Killing Sovereign kills empire:

Killing a Sovereign outside his area of influence should not end a kingdom.  It should instead incur an increased essence cost.  I don't remember the cost for dying in your area of influence, but the cost for dying outside should be 6 or 7. Five is too low as it only requires a very minor investment in wisdom to bring your essence to 11 and give the player 3 deaths outside area of influence. 

3. "We want treaties from you"

I keep getting spammed by sovereigns who want to set up a treaty with me.  Problem is that the perceived values of their non-aggression pacts is more then mine by hundreds.  I even have the diplomat skill and have been mashing the diplomacy skill tree.  I'm not sure why they have such huge perceived value (maybe armies and resources <shrug>) but I don't want to keep getting spammed by them when its not even possible for me to meet their perceived value. 

Solutions: 

- stop the spam

- let them adjust their perceived value so that I will enter a treaty with them.  *they* are the ones who want it after all