I would excersise caution on grouping all compression drivers together; that is no more valid than saying all soft dome speakers sound the same.
Obviously some are better and some are worse than others.
Harshness is often a byproduct of SPL and bright top end, and since compression drivers like to go loud I can certainly see that stereotype. Some of the stereotype likely comes from PA style speakers that use CD,s and where reliability and output are prioritized over smooth HIFI sound by design.
I used to think I liked "bright" speakers. I've even said as much on the forums. Then I learned to measure and started measuring and turns it I didn't have a clue what I really liked. Imagine that. Haha.
It's true I do like "bright" speakers but only for short demos and low volumes does that preference hold true. I've slowely realized that for louder volumes and longer time (2 hour+ movie) I don't at all. I like it flatter, and where distance naturally attenuates the top a bit. Fatigue and "harshness was one of the things that was improved too. That's one of the problems with subjective feedback from GTG events and short demos and lack of accurate measurements of the manufacturers, the options are less accurate with reality because they are based on a short and unique situation while anechoic speaker measurements will apply to all owners of those speakers.
I think here's a lot of speakers on the market that are a bit bright on top and that might show well in a short demo, or moderate volume, but will also be fatigueing or harsh at high volumes. I can think of a few popular ones where this is somewhat true. I don't think that's true for you though, and you have a secret weapon (Adam) to set it up right.
Soft domes are smooth, but they also don't generally get as loud too. So there's that battle of smoothness vs volume and the effect volume has on perceived harshness. At a low volume most people don't hear the top end very well so a little boost could be prefered but as the volume increases so does the ability to hear and at some point it can be too much. Speakers about about accuracy, too much of something isn't accurate.