From the ingame descriptions:
"A small directed explosive designed to knock down walls."
"The Shaped Charge has a limited range and area of effect and will not cause injuries, even when loaded in a Grenade Launcher. It is very loud and will alert nearby enemies. For the purposes of perks, it is treated as a support grenade."
"Destroys environmental objects."
So I guess its meant to provide alternative means to get into or out of a building because most grenades in LW2 do no longer cause sufficient/predictable environmental damage?
Is there any other, may more specific use case? Does it destroy environmental object that are indestructible otherwise?