Mosaic has been better lately (atleast in my personal experience, so I do understand I could have been lucky with my lots) and the only time I’d call it divisive is when it’s a single hop or at a really rate in a combo.
If you are competing, I’d argue that the style guidelines are really written with the combo citra/mosaic/galaxy in mind, so it’s definitely safe to use 2 or all of those in that instance.
This is purely anecdotal of course but my experience competing in this category is that the way we currently approach the style (fidens, green cheek, north park, etc) isn’t quite within the style guidelines as the body is too viscus/creamy and the finish is too full and not dry enough. And i seem to so far better in northeast and west coast competitions. But anywhere from like Ohio to California (exception Colorado) i typically get dinged for my mouthfeel as too “thick” or “creamy, not to style”. I’ve also had better luck in the northeast/wc with unique hop combos. My assumption is that judges in their area perceive the style based on what they are used to in their local markets and judge based off that.