the Metas aren’t muffled at all, you cant judge anything at best buy they don’t know how to setup anything. it is possible the bi-wire knob wasn’t tightened so you might have had no tweeter at all. also add many low resolution electronics poor source quality and usually poor wiring and a switching systems.
Please go to a good specialty retailor hooked up to a high quality integrated amplifier with a high quality source and then judge them for your self.
https://www.stevehuffphoto.com/2023/05/05/kef-r3-meta-speaker-review-juicy-beats/
https://www.whathifi.com/reviews/kef-r3-meta
we can guaranty you will have a very different opinion.
also many people find the B&Ws too bright.
Dave and Troy
Audio intellect NJ
Kef dealer