What is the single most important thing to be patched?

[DisruptorX]

Remove the Egyptians or make them look like they should, there is no excuse for the way they look. "Silly" would be an understatement.

No turning on a dime for chariots.

No Druids. This is NOT Warcraft 3.

Make every unit obey orders when you issue them the first time.

No dancing Phalanxes

SLOW DOWN THE GAME TO MTW LEVEL.

AI. No more zerg rush. Make them behave like actual generals.

No Suicide generals.

Fix Diplomacy.

Remove ALL fantasy units. Especially the Egyptian ones.

Fix the way that units move so that pursuing doesn't involve horses running
in front of the men they are supposedly "following".

Fix the way units get stuck in terrain and can't enter town squares. I have lost battles because my men refused to enter the town square. No excuse.

Allow spear walls with, you know, SPEARS.

And most importantly:
REMOVE the starcraft UI bar at the bottom of the screen. It takes up a third of the damn screen.