-Skirt by default
-Reduce manpower to 250 but add 20 seconds to the build timer so it doesn't come out so soon.
-Keep the bazooka so it keeps parity with 222
+1
The best way to balance the game in its current state and to avoid unintended second and third order of effects, is to adjust cost. If the unit is over performing for cost, then make it cost more. If it is underperforming for cost, like the M20, then make it cost less. Keep it simple.