Yeah, if the land has to be movable it’s going to be more difficult. That’s where form extended structures would really help. Unfortunately a lot of the Destructible bugs that are entered are backlogged. It 's not a priority for Epic at the moment. That particular one has been logged for quite a while though.
This bug is simply backlogged and there isn’t any definite timeframe for any fix.
If you’re comfortable with C++ and working with that particular code then it’s possible you could fix it. If you were to fix it, you could alway submit your changes via GitHub to be integrated into the engine and get your name in the engine’s and release notes credits. 