Advantages of m20:
1. Unilateral attack on an opponent who does not have an anti-vehicle.
Lul at the time it hits the field, only if you play vs USF (non vet rifles), UKF (no snake) or Soviet... Other than that, Ostheer and OKW have pfaut.
It's not that bad, just too expensive.
Lower MP to 220 and increase buildtime so it doesn't come out faster.
lul again, what a nerf. So it comes at the same time with the 222. Today if you´re careful you have the 340mp and fuel when the lieutenant is completed.
Imagine you're in a game where you're getting outmatched, your rifleman can hardly keep any offensive up and your opponent is going to get his first light in the field.
The M20 is here to help, you can apply good pressure, get fast dps(your compare the dps to the 222, did you check the scatter value on each?)
And...you get a free bazooka...
If your opponent is ostheer and happen to get a sniper, you can trade your M20 for it.
It's a expensive unit overall but it does its job.
Lul 222 is simply twice better than the M20 while being twice as cheap. You've got a good imagination, can't deny it, if I was falling back the M20 would be the last unit I build to keep pace with my opponent.