insert image method would be handy, I manually copy the URLs all the time

markdown would be handy but bueditor (https://www.drupal.org/files/images/bueditor-screenshot_0.jpg) does not really convince me, the current real time preview Full HTML method is quite handy.

image resize filter would also be handy if it integrates well.

Insert now works on "files" in projects: there is an insert button that pastes the correct image tag in the textarea. Some timesaver already.

I didn't install bueditor, but ckeditor instead, for those times where a quick wysiwyg edit is in order (and copy paste from google docs that retain some html).

You can switch back and forth between the editors by choosing the correct text format.

Can we integrate the apertus CSS into the CKeditor so the editor displays the content like it will be on the website already?

I remember I already tried to do this some time ago and gave up at some point, we should properly document the problems now to not loose all the progress again :)