Unless the 'W' above is a mistake, the OP has the wireless version of the LS50's with built-in amplification, so I don't think the problem is lack of power.
Personally, I lived with the original, passive LS50's for a year or so, upgraded virtually everything else in my system and added quite a bit of sound absorption to my room, but could never get rid of an edginess that was ultimately unacceptable to me. Traded them in for more mellifluous speakers (Alta Audio Rhea's) and all was well. They really should have decent bass, though, down to 40 Hz or so. I suppose it depends on what level of low bass is necessary for your tastes.
Some folks really do love them, though. Like John Darko:
https://darko.audio/2016/12/kef-ls50-wireless-review-dars-product-of-the-year-2016/
Have you tried the room correction/DSP?
Personally, I lived with the original, passive LS50's for a year or so, upgraded virtually everything else in my system and added quite a bit of sound absorption to my room, but could never get rid of an edginess that was ultimately unacceptable to me. Traded them in for more mellifluous speakers (Alta Audio Rhea's) and all was well. They really should have decent bass, though, down to 40 Hz or so. I suppose it depends on what level of low bass is necessary for your tastes.
Some folks really do love them, though. Like John Darko:
https://darko.audio/2016/12/kef-ls50-wireless-review-dars-product-of-the-year-2016/
Have you tried the room correction/DSP?