Make the Units in the Garrisons High-Leveled (Dominion)

In the Dominion Antarctica map, I noticed that all the units in the garrisons, even the main garrison (Garrison Lindwurm) are Level 1 units. At around Day 14, when those garrisons are accessed, players usually have higher leveled ground and air units available to attack the garrisons with. So, even if the player is at a numbers disadvantage, they can still defeat the garrison simply because they have higher leveled units. I think that the units in the garrisons should be at least the first "high-level" unit, if you know what I mean. For example, for Armoured Cars and Light Tanks, that would be Level 4, for Heavy Tanks it would be Level 3, for Artillery, AT and AA it would be Level 4, and so on. This would make the garrisons less of a pushover.