I have a Sonos Arc + Sub Gen 3 + 2 SL One system. Post updating to 14.18 and retuning Trueplay, the following EQ settings seem to work for me. It will be good to know the settings that worked for you (to try experimenting!)
Bass +3
Treble -3
TV Level 0
Music Level 0
Music Playback FULL
Sub +2
Height +4
Loudness ON
Trueplay ON
Night Sound OFF
Speech Enhancement OFF