PTRS should be a semi-automatic rifle with the old accuracy. Guards should have 1 PTRS instead of 2 and the conscript one should cost like 80 munitions. That way it will be used in its intended role, light vehicle counter. Also demo charge should always be visible, you are planting it above the ground for God's sake. And the call in tanks should be included in teching just as OKW.
Snipers and jagdpanzers are above ground too and they can get cloaked. I mean if you want we can ask relic to make demo look like a bush or something. Camo in game is not showed everything that has camo just gets invisible so your complaint about demo is kinda silly.