I think allowing boats on transports would be hilarious, say a 1 sub on a t1 and a destroyer or 2 subs on t2 transports, I don't have the means of making this currently, but if anyone's board, here's something to try.
Other ideas:
Give hover a stealth mode: -10e per hover unit and a giant speed reduction while active, say 1.5 - 2 speed
Forecast idea: this would bring a new level to supreme commander In a big way, a weather generator that had different effects such as:
Heavy rain: reduced vision
Lighting storm: similar to jammer crystals, can cousr fake readings on radar
Mud: reduced speed to walkers and tracked units
Gravity zones: gravity becomes to heavy, slowing hover or making then incapable of traversing the water
Solar flare: large emp ( can be detected ahead of time)
Heat wave: reduces regen greatly
Magnetic field flux: causes shields and stealth fields to become more unreliable
Unsuitable- atmosphere: reduces speed of planes, make flak super deadly
Sea captain's nightmare : rough waves cause subs to be inaccurate, and force surface ships to move slower and hae reduced underwater vision
Virus zones: the future is a deadly place, if acus wander here they are likely to get Bacteria in their suits, which will likely kill the driver.
These are just some ideas I make the game more fun, tell me what you think
I think the weather idea would be freakin awesome for GW