Kreatiir is right, This game has been riddled down to who is the best at abusing the units the best.
Thats what distinguishes one player from the other. Who can use and exploit their units better than the other guy can. That is the "skill gap" as it were.
You guys can embellish it all you want with buzz words who can "spam" better or who can "blob" better, at the end of the day they are doing it better than you. There is nothing stopping you from doing the same. There are optimal strats/builds and there are sub-optimal ones. More often than not the higher ranked players are using the most optimal strat unless they are messing around with some underperforming units/commanders.
The only real extreme cheese that comes to mind at the moment is doctrinal arty abilities on both sides, mechanized USF arty that can bring down HQs to 10% and be finished off with a few shots of AT, as well as the OKW scavenger doctrine that can 2 shot a USF base. Tactics like truck pushing or strats that involve spamming snipers all have counters and work arounds. Luftwaffe medcrates that you refer to can be picked up by the enemy now, trust me I was on the receiving end of this commander when they were bugged and couldn't be picked up by the opponnent. This is also counterable and manageable.
I guess what I'm really trying to say is, you guys need to have a cup of concrete and harden up. Its a game with a set of rules, rules that can be exploited and abused equally by anyone and all players who isn't using some 3rd party cheat.