The solution to blobbing is very simple. Relic should institute a modifier on infantry of 3 squads or more moving in unison outside of cover.
This modifier or aura would result in nerfs (accuracy, suppression, damage, etc). This would immediately punish blobbers and increase the effectiveness of all support weaponry while not making them OP when they are used against single squads.
This would also be realistic as moving all bunched up would make you more susceptible to both enemy and friendly fire. To me it's clear as day and don't understand the flak people get when this has been suggested in one form of another.
Modifiers like that would also punish someone who has 3 squads microed behind cover that just happen to be too close to each other. It also punishes a 3-way flank on one location when the units get close enough as they close in. Modifiers are generally a bad idea.
The problem with blobs are that the counters are not effective enough (MG suppression) and that they are too effective at taking counters out due to lmgs (lmgs might need to be toned down because they decrew MGs before getting suppressed) and (mainly for okw) schrecks.
I would suggest a similar thing to what Cruzz did in his mod: change the effective range of lmgs to not the max distance of the gun but bellow that and make the damage drop after that point (though I'd argue that it should drop more than it doess in Kappatch at the moment). That way a-moving a lmg blob is far less effective.