To start, no Sirbomber, it is NOT a Death Ray
I really don't think these ideas will go anywhere, but i just think they make sence if you couuld, or they would be cool to have, and cool as in i like it not as in EVERYBODY needs to use it 24/7 >_>
Tiger Tank Dig In: Basically, any Tiger Tank can spin its tracks backwards really fast to dig into the ground becoming a "turret". The "turret" would not be premenent but instead would just increase defence of the Tiger Tank. Make it like a Offence Post. Possibly even get it to lower attack range so it doesn't act as you invade the enemies base then deploy, but you go by the enemies base and deploy to do a Cold War type thing, they walk out and there toast. French Toast. Cause they serender. Never Mind.
A Ledgit Trading Thing to Allies: As i said, a good way to share tanks, resourses, and possibly tech/building and population. I think that you should be able to get cargo truck to do continous shipment of resourses to allied bases, so theres more use for the trading post. Maybe you can also send a passenger truck to drop off population to allies. I think you should have to pay a small amount of ore to trade things, to make the boxes for shipping
Handycap Meter: A handycap meter when playing multiplayer, and more then just amount of resourses. To help production, research, and even a bounce unit or something... but yeah, thoes are me ideas.