Concentrating your forces for a breakthrough is one of the most basic tactical options available to you in pretty much every RTS.
It is true about most RTS games.
However (and by the way, I think we share the same opinion hwere, please understand I'm not saying you're wrong)
CoH1 was great in that, regarding blobbing, it moved away from pretty much every RTS. (NB
CoH1 also had a serious issue with Blobbing in the mid-late game. Early game was glorious though)
I'd like to differentiate "blobbing" and "concentrating your forces"
Blobbing is when there are a lot of units in close proximity
that can all simultaneously focus-fire on single enemy units one by one. Check a Sprice game to see how well this works. My personal feeling is that this overly-simplifies the game and reduces the enjoyability. That is subjective and a matter of taste so if other people prefer the blobbing-type games, fine. it seems there are many of them, I always hope CoH2 will become an alternative.
"Concentrating your forces" is when you have a lot of units in one area but spread out. One squad will be used to draw fire, another will be used to suppress enemy reinforcements, another will be used to flank an MG so that a fourth unit can take out the enemy AT gun or forece it to move back so that your armour can move in and do some damage.
I always enjoyed that dance of units moving around to the exact location needed to be to pull off a beautiful flank and the opposite dance performed by the defender, moving units to fend off your attack. And then the counter-attack and counter-defence. It can be so rewarding.
In CoH2 this is not so necessary. Success can be achieved by running in a large blob, picking off units one by one. This is less fun to my mind. CoH2 has the potential to incorporate game mechanics that will make a mind-blowing revolutionary RTS. It already has True-sight, Suppression, Cover.
TLDR - the game would be spectacularly good if blobbing was made much more difficult.