Generally speaking the room, size and speaker orientation you describe should sound very good in an average room . How is it sounding?
Maybe I missed it but : Are you reporting this because you’ve moved to a new listening room?
Or have you just decided to play around with speaker positioning?
What type of positioning have you used for listening over the past 10 years with your Thiels?
(Also, if you could just relieve yourself of the audiophile myth of cable burn in, you could just relax and enjoy the sound… cables do not need to burn in - the idea that they do just adds another layer of audio neurosis where one is concerned about issues that don’t exist).

