Proposal:
Make GDR a standalone Unit which cannot be gained by upgrade from Modern Armor
Can only have 2 active GDR at one time
Increase production cost from 3000 to 4000
Rationale: GDR is very special Unit, which is different from tank Units. It's available in other part of tech tree and can be unlocked without Modern armor. Quantitative restrictions is only needed to avoid any abuse of its power (by analogy with Supercarrier). Increased production cost should emphasize it's power (it feels twice as stronger than modern armor which has 2500 Production Cost)
Make GDR a standalone Unit which cannot be gained by upgrade from Modern Armor
Can only have 2 active GDR at one time
Increase production cost from 3000 to 4000
Rationale: GDR is very special Unit, which is different from tank Units. It's available in other part of tech tree and can be unlocked without Modern armor. Quantitative restrictions is only needed to avoid any abuse of its power (by analogy with Supercarrier). Increased production cost should emphasize it's power (it feels twice as stronger than modern armor which has 2500 Production Cost)