Most of what you wrote is just difficult to comment because it suggests you should play ostheer in the next 10-20 games, but when I have some time I'll explain why it is difficult to agree with many things you wrote. Generally you must realise that OKW is much stronger than ostheer and some of your impressions are based on OKW's strengths (like volks being pretty potent all around squad with a snare).
The problem from the topic is about cons vs grens balance. IMO conscripts are better at at duties because of their hoorah ability. Grens just don't have that and they have trouble fausting and chasing - sth conscripts can do. Cons are build from tier 0 and grens need a structure - so you don't tech to build cons but you tech to give them extras; you tech to build grens but you don't tech to give them panzerfaust. Cons are 6 or 7 men while grens are 4 so it is easier to wipe grens with vehicles they snare. Cons also build sandbags, grens don't. It is easier to sniper gren than cons. Hoorah can chase and even allow you to kill snipers or run away from them plus higher number of models makes it safer. Cons can be also used to merge, which is verypowerful ability. Coming back to snares there are many more ways in which cons can cooperate with other AT squads. Cons hoorah and snare, penals stchel and fonish off.
a
Cons are a good snare unit i agree 100% on that.
But at nade cant be used on buildings, cons lack any sort of decent nade, ptrs,s scale a lot worse then shrecks. The at satchal has an extreme short range, to short for it to be a viable alt to the cons at nade, Tm35 mines dont one shot all lights. Zis and both su,s dont have a snare on them after vet.
Grens do not need to cooperate with other units to finish things off as much as cons do. Ost as a faction does that better then sov.
Grens dont build sandbags but build bunkers. Wich in turn can grant you healing reinforcing and a popcap free static mg. Its not free like the sandbag but you do get more out of it.
Merge is indeed powerfull esp at end tech with 7th man. No argument here.
The thing is about the cons gren balance is that grens need the support and cons are the support. Imo grens dont suck, volks penals sections and rifles all are to good right now.