That's a great idea for it to be some new type of wall, but that requires a lot more work for coders and spriters. The sprite work could give it some Blood Cult vibes. The walls of flesh leave messy gibs everywhere, and when broken they drop meat.
I still think it would be worth experimenting with it being blob wall. Blob wall that's disconnected from the blob core is pretty harmless, especially if there's no actual blob core on the station. I imagine traitors using the blob walls to divert the crew to a "false" blob, and pranks.
I just had another idea. What if instead of a flesh wall, the flesh foam just leaves messy gibs everywhere it touches that the janitor has to clean up?
There's lots of room to experiment with this idea. We won't know what's the best way to handle "flesh foam" until it's made and released to the public to play with and see how it balances.