1. If a battle platform is destroyed, is the thing on it destroyed as well? One time, I could swear my missle launcher was on a platform and it got hit 6 times before it died, but other times, I have seen a single salvo from an enemy bot or launcher destroy them both.
The Battle platform takes all damage when it is attacked (not the unit on it) much like a transport. If the battle platform is destroyed so is the unit on it.
2. What exactly is the tactical advantage of battle copters and platforms that evens up the lack of bullfrogs and levis?
Flexibility. Platforms move the same speed on land and air, regardless of the terrain. Coupled with rocket launchers you can punish the enemy pretty severely while always staying a couple steps ahead of them. Anti-air platforms render enemy aircraft carriers pretty useless.
Battle copters also have the advantage of being able to ignore terrain, and they can move over enemy units. Makes em very difficult to hit and gives them a long effective strike range in a relatively cheap unit. Hmm, do you buy a Mortar with a 2 range 2 damage strike that moves 1 space per turn? Or a copter with the same attack values that moves 4 spaces over any terrain and any units in between for 1$ more?
3. Why do transports have such insane movement rates?
One of the big parts of this game is mobility. Getting your forces from the rear line to the front, then manuvering your forces to the best ability when you are there. Its a dynamic that keeps the game moving at a reasonable pace.
I would just like to see more room for tactical creativity in areas besides transports (like different damage types that are more effective against different units, anti-air weaponry, extra range advantage for high ground).
As discussed earlier in this thread, adding more features such as these do not a good game make. The cool thing about MA is that there are multiple ways to deal with any threat, each with their relative advantages and disadvantages. If you are encouraged to deal with a specific threat exactly the same way every time you lose a lot of this flexibility.