221 for 240 mp 15 fuel
upgrade to 222 100mp 15/20 fuel more amror , invulnerable to small arms and cannon can pen light vehicle and light tanks but lose all the aoe and mg
That is more or less how it was originally and it did not work. The base 221 was useless and you had to upgrade it to 222 as soon as it rolled in to make any sense; otherwise it just overlapped with the 251, minus the reinforcement ability.
I think the 222 must find a role in the OST roster. It should work as an incentive to the Allied player to do something about it, react to it being the field. This does not work if you can just drive it away with massed rifle fire, because it just tells you to save fuel and spam just more infantry. For this reason, armor increase vs small arms is a must. It must also have effective DPS just enough vs snipers and infantry that it cannot be simply ignored.
In short, to make it work, it must force you tech at least a bit for infantry AT and/or snares, otherwise OST is just shooting it itself the leg by paying 30 fuel for nothing. The current unit does neither. Even before it was good only when spammed in pairs or triples, but increased fuel costs is prohibitive for this.
Secondly, its role and abilities. The 222 is a weak light vehicle, that basically looses to all similiar tiered vehicles, but could be useful against the lightest ones (UC, CC) or when flanking as combined arms.
In the later game, its viability cannot be maintaiend if it cannot fullfill a useful role - as harassment, or as a flanker - and survive since by that time it can hardly fight anything. Otherwise its role is essentially a recon, for harassment it must also be able to get out of trouble fast and could be perhaps useful to deal with isolated cappings. For this, its abilities are poor. It needs something else, something that is actually useful for that like non-doctrinal smoke or something like overdrive or blitz that boosts its get-in, get-out ability (speed).