I feel like there is a misconception on why people like OP and myself would like to see a debuff to blobs in CoH2.
The reason in many cases is not that we lose games to blobs, but the fact that the absence of direct and tangible punishment for choosing to blob -- instead of making your brain and fingers work -- means blobbers don't see the reason why they shouldn't do it:
I don't want to see artificial punishment for blobbing in game.
I would like if it would be naturally impractical to blob, even though most of time I find it easier to play against blobber.
* They see their blobs kill HMGs before the latter can suppress them and think that means blobbing is the way to go, even if their blobs get punished in late game by artillery -- they will just blame it on game design for "OP" indirect fire;
Late game artillery is definitely a tool against blobber, but some arty pieces are indeed OP.
Think of Katyusha and sturmtiger.
Katy is effective only against concentrated infantry, or units with low mobility (team weapons). It is capable of wiping, but to do that reliably you need to fire from minimal distance and it comes with obvious risk.
Sturmtiger is a squad wipe machine (even against lone squads) which have no risks in comparison with Katy (high armor and hp). The only thing is bad about sturmtiger is its cost.