I agree.
In the mean time there is a work around.
From a post I made about the same thing a while back. I haven't played for a while so hopefully it still works.
For those who may be unaware, you can get rid of the supports on flume platforms by building the platform just a little bit below ground level (I use -0.25m). Then when you move it there will be no supports. I wish I had known that about 600 hours before I did. Thank you rando on the internet for that, since I have no idea where I read it.