It's about adaptation, nothing more, nothing less. Before patch hmgs kinda sucked so you should have relied on infantry blobs (including in ostheer's case) and be mobile. Now that hmgs are stealing the spotlight, you should rely on them or on infantry and HMGs together and play more statically. If you use the same tactic every patch, you will have an easy time when your usual units are buffed and a hard time when they get nurfed.
Well, that's the thing, I don't use the same tactic. Since I'm not a good player and do not want to be good, things like strategic thinking, faction teching objectives and such are very ill-conceived. It's all on me, and that's just fine.
Problem is, I like to take some creative detours, and sometimes it works, sometimes not. Blobbing is not fun, at least for me. I like to make panzergrenadiers, build the occasional leFH and I even have fun using German Infantry Doctrine. It's so sad that, when you try something different, you gotta be very good or you'll be punished by the Meta Bat.
I understand that some tactics will work better than others, this happens in every game known to man. I think, though, it's glorious when the difference in ease and effectiveness of execution of meta and non-meta strategies don't fall so appart of each other.