Just to let everyone know: I have a (still very basic) first version ready for the new editor. Main issue atm is a
bug present in the current alpha of 4.1.4, but hopefully this will be fixed before release. So, bottom line is, yes, there will be a version that works with the new editor.
Edit: There is
another issue: Atm, there is not a single hook present in the new editor. W/o hooks, I won't be able to insert a button into the toolbar.