How can we reduce (optimize) the size of the rich text html generated when using ortl

Using PeopleTools 8.61 we now moved to ORTL instead of CKEditor.

We see that our users are copy/pasting text from various sources (word, onenote, …) which often bring a lot of background html for the formatting of the rich text. We are talking factor 1:10 or even more. We want to keep the formatting (bullet points, bold, italic, hyperlinks, images, …) but would like to optimise the html received from the ORTL layer (previously the CKEditor).

The goal is to reduce the overhead to a minimum without loss of markup. When loading this reduced text again into the ORTL editor, it should be presented as before (or as close as possible). Any tips?