I decided to upgrade my 2012 LS50 with a new LS50 META. I recently found my LS50 lacking after I got my RAAL VM-1a headphone amp paired with the SR1a headphones. The descriptions of the Meta sound was what made me make the switch. My SR1 has more clarity and transparency over the LS50. The Meta is supposed to be improved in those areas, so that will be great if true. It is on order now.
The Blade Meta should also have similar improvements (+ more) compared to the LS50. I decided to be an all-KEF 2-channel household with the LS50 Meta, KC62, and the Blade 2 Meta in the near future.