Hi. Some time ago, I worked on a rewrite of the effect stack. The goal was to make it possible to view / change parameters for several effects in the same dialog, and also get prepared for more more advanced stuff like effect grouping / effect masks.
I just updated this work and it seems to work. You can see a screenshot of the current and new widget here: http://kdenlive.org/images/tmp/effectstack.jpg This work is available in the "effectstack" branch, but looks like nobody has tested it yet, so I was thinking about merging into master. Any thoughts, questions, comments? jb