Alright.
Here it goes:
Mini Mother ships - Basically Mother ships, just mini mized, and take a bit longer to make units. Can't attack other units but can heal other units.
Super Powered Vehicles - These will cost A LOT of crystals and be super powerful. Can only be made my mini - mother ships
Turrents - Self explanatory
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Pre-spawn thingy - Basically, you can set a spawning point for all units made by the mother ship, so they can go there. Would be very handy.
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Map:
Mountain - Many paths to the top where many crystals are. So basically, it is a mountain, with a few crystals on the bottom to balance out the major crystals on the top.
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Artificial Crystal Maker - Cost 500 crystals, and this is probably self explanatory
Not one of my best ideas, but worth throwing out there.
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Game Play:
2 on 2
3 on 3
2 vs X amount of AI
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All I have now, I will edit for more ideas.