I already worked on a new Stamper version with this feature, the map is only in beta state right now but it is possible to destroy almost the entire map, like the cover points or the catwalk, stairs etc.
Of course it is not that easy to destroy something, it requires quite some firepower. And the catwalk on Stamper is pretty big, hence there wont be "one" catwalk to destroy but about 50 single parts from the catwalk that each can be destroyed independent from another one. The catwalk has about 50+ pieces that each can be destroyed.
The catwalk is of course more difficult to destroy than a simple cover point or a random static mesh.
Here are some first screenshots and a video. Some of the screens are also included in the video, and the one where almost the entire map is destroyed was only made to show how much you can actually destroy, it would take a very long time to actually destroy all these objects.