I’m with @carlsbad. We have to note that despite their embrace by so-called audiophiles, there are a LOT of USED KEF LS-50 and now LS-50 Metas for sale relatively cheap on eBay and other outlets. That alone says that maybe they grow old fast on people. I mean for a small little thing on a desktop maybe, but I’ve never understood the draw of such baby speakers in a decent sized room unless you add a good subwoofer to them. To each their own. If you were happy with the sound from the Fluance then be happy. Sometimes the brain and psychoacoutics can play tricks on even the best person calling themselves an audiophile. Many people upon hearing a X priced whatever will think, "Oh man that does sound good" until you tell them it was not X priced but Y priced and much cheaper.
Don’t get me wrong. Nothing bad about BETTER quality gear that is often pricier, but measurements aside, "better" is in the ear of the beholder.
There's also this thing called "synergy" where it is the complete system that delivers the goods that matters. Perhaps your amp was happier driving the Fluance than the KEF.