if you think that your Ostheer Infantry can win toe to toe Vs Allies CORE infantry you are playing the game Wrong. you need HMG support, Mortar support., planes to check the and know the attack vectors.
WRONG.
Such design is wrong as this only ensures that you have to mix your forces all the time between easy-to-displace and flank support weapons and infantry, meanwhile the Allies can just spam infantry and gain map control far more easily while you struggle to babysit fewer and squishier Grens at all time.
You can build 2 Grens, an MG and a Mortar but at the same time the Allied player will have 3-4-5 and perhaps an MG, more core infantry that beats yours 1-on-1 and the opponent will get map control. You cannot get map control with support weapons, they are far too static for that, and cannot maneuver effectively with the zillion of buildings, hedgerows and whatnot that is placed on the map. Core infantry can.
And as for the much fabled OST support weapons, in practice they are not better. Infantry supported by MGs will beat infantry without MG support, no matter what MG that is. Suppressed infantry is just suppressed infantry. The only thing the MG 42 is good at is unsupported static defense in the first few minutes in the game. But since you MUST build an MG 42 no matter what it only means that you will be outnumber in the core infantry game. Later in the game OST usually crumbles as its support weapons gets wiped or unsustainable in the field, because the cement that could hold it all together - mainline infantry - is just not there.
Even OST light vehicles are such a non issue that they can be simply ignored, or driven off by blobs because they are vulnerable to even rifle fire and can be just driven off with a large enough blob. You rarely see Allied players going for AT guns, why, because its such a NON ISSUE for them. To add to the troubles of OST, they are by far the most vulnerable to light vehicle rushes early game if the light vehicle is well microed and just stays out of faust range, it will just bleed you to death.
Core infantry absolutely MUST be competitive to each other with advantages and disadvantages, such as reinforcement cost, field presence, DPS and so on. Correct positioning, choosing the distance and using your advantages should decide the engagement, not just brute forcing your way through Grens all the time.
Right now OST infantry has only disadvantages. It basically looses to every other infantry at all stages of the game almost regardless of how you place them or maneuver them. Its DPS is mostly meh, party because 4 men squads cant stay in the field for long when they loose two members, they MUST retreat or get wiped. And you loose two members faster than other faction to boot - Gren RA is meh, and 5-6 models firing on only 4 models will make a Gren model drop faster than if this damages is spread out on more models. And the more you get of them, the more they will bleed you to death. Reinfocement costs on Grens are absolutely ridiculus considering how fast they drop.