Asymetric faction design.
Wehr indeed is currently disadvantaged in being unable to cost-effectively fight infantry battles, and in a number of other respects. Unless you go full tryhard Osttruppen that is, but even that won't do against Rifle Flamers. Also, never employ PGrens in anything but an auxiliary role.
Anyways,
My advice is to do what I do and treat it more as the comedic relief faction it is, I've been trying infantry doctrine and all the other thoroughly non-meta commanders recently, its been a blast.
both the wehr and the OKW suffer from brittle infantry. All the received accuracy in the world isn't going to make the grenadier or ober resistant to explosive.
wehr might have the more damaging support weapon, but their infantry and support weapons are also more fragile. Wehr is a faction of glass cannon. The soviet and USF both have excellent mean of exploiting the wehr's lower infantry count.
Previously the USF had to rely on rifleman, but now they have the pack howitzer to rain death upon the wehr. Rifleman don't need the uber vet 3 bonus anymore.
the HE sherman is almost cheating against the wehrin 1v1. the only reason why the HE round needs to be so powerful is because they need to fight against schreck blob.