I think there could be a setting on barriers that is like "disable on button press" (on/off) and then you could choose what number button, same thing for something like "disable on objective break" and choose an objective number. It could also be so you could enable it on an objective break so a wall forms when you break an objective
It's a good idea. We call this sort of thing "channels" and it might be something we introduce to Creative. We're still talking about it. Thanks for the suggestion.