If you change to a more forgiving speaker like a Verity, or a Sonus Faber, you will be giving up on the excellent Wilson clarity and dynamics.
Your issues are most certainly room and setup related. It sounds like you have done some treatments, which is a good start, but the next step is to take a more objective approach to acoustics. That low ceiling isn't working for you.
If it were me, I would look into hiring an acoustic consultant who can take full measurements of the room acoustics issues, and work with you to address the acoustic shortcomings.
If you change speakers, you will just have a different set of problems.
Your issues are most certainly room and setup related. It sounds like you have done some treatments, which is a good start, but the next step is to take a more objective approach to acoustics. That low ceiling isn't working for you.
If it were me, I would look into hiring an acoustic consultant who can take full measurements of the room acoustics issues, and work with you to address the acoustic shortcomings.
If you change speakers, you will just have a different set of problems.