Here is the current list of what will be in 2.0(including those in 1.21), and may change. I've not included every little thing i change like in 1.21 as the big changes got lost in the readme. This new list should make it easier to see what i have changed:
Battlemap
-General all round better balance of units
-13 new custom battle maps.
-Spearmen rebalanced so they are now more effective against cavalry
-Cavalry charge is less devestating than in normal M2TW, but has more impact and heavy cavalry can still wipe out sword infantry pretty easily.
-Longbowmen given longer range, slightly better attack and faster rate of fire
-2 handed axe unit bug workaround. They now use a different animation and rebalanced attack stats as a result.
-HorseArchers charge fix. Now all units will charge properly, and light cav is the best against routers.
-Slowed movement speed on the battlemap
-Incorporated Darths Formations v1.0 for M2TW
-Musketeer/Hand Gunner units attack reduced
-Byzantine Infantry, Varangian Guard and Kataphraktoi made more powerful
-Range of low level artiller increased
-More variation in stats between units that previously had the same stats(Order Knights, Dismounted Druzhina and Dismounted Boyars Sons)
-Venetian Heavy Infantry and Archer armour upgrade bug fixed.
-More difference between arrow and crossbow projectiles.
Campaign map
-1 Year per turn, and dates shown on campaign map again
-Building construction times and cost increased so as to fit in best with 1 year per turn campaign.
-Ultimate AI Mod incorporated, makes camapign ai better, diplomacy is more logical and alliances are much better. But still a nice element of backstabbing in the game.
-Unit recruitment changed. Units now replenish slower and elite units have smaller recruitment pools. Also units no longer recruited from walls or from castle upgrade buildings.
-Ai recruits better armies. They are more balanced and have more higher tier units in them.
-Merchants make more money.
-Inquisitors made less powerful.
-Unit costs tweaked so ai builds more balanced armies.
-Money script for ai factions so it gets a cash boost when it gets low on cash so the campaign is tougher.
-Increased movement distance for armies and agents.
-More recruitment slots in castles.
-More free upkeep slots in cities.
-Recruitable generals.
-Assassins made more powerful.
-Pirate and Rebel spawn rates reduced.
-New population levels required for each level of settlement, but lowered slightly from 1.21.
-Distance to captial penalty increased, but not as severe as in 1.21.
-Religious Unrest increased.
-Corruption increased.
-Income from trade increased, and population growth from trade decreased.
-Population growth from farms increased.
-Cannon/Ballista tower bug fix included.
-Assassin and spy movies back in the game, thanks to a .bat file i've made that copies them over during the install.
Graphical
-New loading screens and splash screens.