Elite levels

Hi
I think that when you have upgraded something to the max level there should be a thing called elite level it would obviously cost loads what it would do is when you upgrade it to the elite level it give you a choice to do. E.g. If it was a cannon you would get a choice of:
1. Freeze bullet slows the enemy down.
2. Smaller size it shrinks it so you can fit more around your walls.
3. Acid bullet gradually deducts hit points off of troops.
4. Bigger range it shoots further.
5. Healing it heals its self gradually when nothing is attacking it.

Or if it was a troop then maybe make it smaller so it has less troop capacity

This would be the max level.

Tell me what you think
Thanks

I like variety in general. However, I'm afraid that these choices (which would be permanent I guess) are very difficult to balance. Players would be very ♥♥♥♥♥♥ if they found out that the "poison cannon" was a bad choice compared to the "ice cannon" etc.

But if you could toggle through different ammo types, depending on what your defense strategy should be, it could be a great addition.