Welcome to the forums & to the fam 
Build mode is a bit abandoned so to speak, and there are so many things to be improved… the potential is 100% there and I want to think and hope they will get to build mode eventually. Canvas creators are a good chunk of the most loyal player base since launch, and among those there are builders; building is gameplay in itself and it deserves some love: resizing,cluttering, XYZ transition and all the ideas you propose here: I agree!
@Moooody posted something about build mode improvements too so I am sure they’ll agree!
PS. Your english is perfect.