Hey there, love the tool, and using it for a my next commercial project :)
My suggestion is more a wish, and might come from my ignorance in MP's usage. (I think I skipped the tutorial)
It would be nice if there were a Handle on each node to drag it, plus all of it's descendants. This is instead of breaking the Branch away from the Leaves, which seems to be default now.
I know I can multi select by the selection marque, but I think this feels more intuitive to me, have a Handle or location of the task that will bring all leaves with the branch.
If this is not of interest, please feel free to ignore my post :)
Again, thanks for the tool. It is really useful as-is.