please go back to the old editor befor 4.8.1
the new one is missing features like direct html editing, now you have to use the “save and switch to HTML Editor” Button which is so much less convinient.
Perhaps it is just me but it feels like my work was way easier with the old one.
I am getiing old: I worked with The Newsletter Plugin some years ago already but obviously forgot the process implemented. I expected a html editor for each section in the composer (which would be really handy).