Charles1dad, I have a good 100 hours on the CSL now. Much to my relief, at this point there has been absolutely no aberration in tone or timbre and the the CSL is just dead silent. Dynamics, as expected, is much improved, but not at all in an unnatural sense. I have heard many actives that had all kinds of dynamics--sounded quite impressive if you had no live acoustic music frame of reference. But for me they sounded like hi-fi, not music.
Not long ago, I started a thread asking for recommendations on putting together a system specifically for listening the chamber music. Before introduction of the CSL, it was normally difficult if not impossible to discern in space the location of the 1st and 2nd violins. The CSL just nails it! Image, especially depth of image, is really impressive. Looks like it wasn't the Maggies, it was the Promitheus. It was a good thread with a lot of great suggestions, but now, I don't know if that project is really necessary. Might still be fun, but maybe not really necessary.
There is no downside at all as far as I am concerned with the CSL.
I think the passive vs active debate is still relevant below a certain price point. With the CSL, we are beyond that price point.