I think the riflemen short range dps buff combined with the (admittedly miniscule) volks price nerf will solidify a slight 1v1 edge for riflemen versus OKW, but in general I just think you have to tech nades if you want to deal with OKW blobbing without sacrificing map control completely. Tried it once and killed a fuckton of volks with nades, though I admittedly lost that match.
I rarely tech to grenades and when I do it's almost always when I'm floating extra man power and fuel. I feel like they're too big of a risk. If your opponent is not paying attention and you can wipe a Volks sqaud or two then side teching is worth it but if they're paying attention then it's just wasted munitions and fuel that further delays your teching.
I do hope the Riflemen buff works out. It doesn't sound like OKW really is getting much of a nerf but we'll see.