reduced minimum crates to 0.
reduced range of tower missile

Towers are too good right now and lead to stalemates. This will let them be outranged by 1 by siege tanks.
Added minimum range so that it can't hit the square next to it.
Siege Tank has movable turreted

Siege tank is kind of useless. Given a moveable turret.
This unit is needed to break stalemates.
improved siegetank weapon vs. heavy armor & buildings

This will make it slightly more relevant on the battlefield. It shouldn't be excellent at fighting armor, since armor is what should kill it, but it shouldn't be totally helpless either.

damage vs. heavy increased 25% -> 50%
damage vs. wood increased 60% -> 80%
inaccuracy reduced 45 -> 40
speed increased ever so slightly.
adjusted rocket tank

Rocket tank is a bit too good vs. armor and infantry.
It should be a generalist but its strength should lie in attacking buildings and light vehicles.

Speed increased a bit.
Damage vs. heavy reduced 80% -> 50%
Damage vs. buildings increased
Damage vs. infantry slightly reduced
rocket tank rotation speed increased; +1 sight

since it's forward-facing and quite vulnerable, seems it should have some decent maneuverability so it doesn't get wasted so easily.
Increased sight range slightly.
minor: trike ROT +1