What balance changes would you like to see?

What the title says, what do you think should change or be balanced to make aoe more fun and competitive.

Personally i think siege units are too effective Against other units, seige spam is too effective against everything it is almost comical to see an entire army levelled before getting close. Lower the rof of helipolis's or nerf damage against other units so they are used mainly against buildings,walls and towers. Secondly the hp pool of elephants untils are way too high, its higher than a wonder, which is the pinnacle of your civilisation. Now i am partically pionting the finger towards the elephant archers, they are walking fortresses, and when you get enough of em, they can't be stopped. Only really countered by .... siege spam..