My name is Tervel Peykov and I am one of the people responsible for implementing RadEditor (the Prometheus and non-Prometheus version). I have to admit that your disappointment is fully justified - we were not able to deliver the editor Prometheus version to be equal to the non-Prometheus one, and despite the several additional features implemented for the service pack, there is still very important functionality missing especially when it comes to the dialogs.
Allow me to shed some light on what the Prometheus editor is all about, which I hope will lessen your justified frustration. The Prometheus version of the editor was not conceived as a simple port of the non-Prometheus editor to MS AJAX. In fact, quite the contrary - the Prometheus editor was clean-written from scratch to address all the fields which had proven problematic over time with the non-Prometheus editor. Most of all we concentrated on greatly reducing the loading time, full integration with AJAX, easy deployment and better XHTML output. In the following forum thread I earlier outlined the ten major improvements of the new editor over the "old" one - http://www.telerik.com/community/forums/thread/b311D-baatdd.aspx
The service pack just released also adds the convenient AJAX Spellchecking
(a serious challenge to port on its own), as well as three of the four
editor modules. The module that you are most concerned about is currently on its way and will be ready literally within days. In fact I believe we can provide an editor download available immediately when the module is ready - which is not a complete solution, but does provide 90% of the property editing abilities of the [table, cell and image] dialogs.
Once again - I understand your frustration completely, and I do not mean to say that we did well. What I am aiming at is that our focus was to lay out a very solid foundation for the new editor which was based on taking completely new approaches. To our credit I will say that those approaches proved successful - the new editor does perform and scale much better, and there are more speed gains coming. However, that said, over this solid foundation we were not able to lay out all necessary components on time.
Work on the dialogs, however, continues and we, too, want to have those out as soon as possible.
the Telerik team