The problem now is that we have to learnn using them like shock troopers closing them to hug distance in order to kill efficiently.
That is not true.
The Sturmpios are still as effective at mid range as they used to be. In green cover they will still dominate any not upgrades T1 infantry and lots of higher tier and upgraded T1 inf. They just can't charge in over open ground without cover and win vs infantry not in green cover this way anymore. Wich was pretty much BS befor.
Now they are counterable with T1 inf. Wich is how it should be. If a unit wins a fight depends on wich player makes the better decisions.
The MG34 hasn't been tone down a lot. It has been changed. Actually it got more acurate at short range and the reload time is reduced. Wich is a buff.
The set up time is a bit slower, the supression is a bit lower and the long range effectiveness is a bit lower. So its performance as such has changed. Its not a MG42 with a different skin anymore. Its a different weapon.
Since its a doctrine unit as such its not a reliable or go to solution anyways.
For blob controll the Kübelwagen works pretty good now. Since it has been changed and is much more usefull. A K'wagen and two Volks can stop a blob. A K'wagen and two Sturmpios can "de blob" if the the supressed units don't retreat.
Wich again is how it should because now the OKW has access to a usefull supression weapon without having to pick a certain doctrine.
As far as I can tell now its very much like in CoH1. Neither for the US or SU nor for the Wh or OKW blobbing rally works anymore. For example on of the preferred Wh tactics of simply spamming Assault Grenadiers is allmost an auto loss now. With a little micro and the wonder of focus fire this can be kept under controll until the first armored unit hits the field. Since Assault Grens have zero AT capability this usually means gg. A single Maxim or Dushka and the blob is flat on his belly.
Same the other way round. A single supression weapon and its either retreat you blob or get deblobbed.
Blobbing is not really an effective strategy. Its just a unimaginative brute force approach with minimum skill requirement. Now flanking and maneuvre and combined arms beats it every time.