My personal opinion is you have a very open and telling speaker system now. I think you are hearing a problem somewhere else in your system
Break in will help but basically for me it is rare to go from ugly to great. Certainly new speakers sound held back and times settle in and detail comes out but a drastic change is rare in my mind. Don't get me wrong there can be huge changes but just not from unacceptable bright to wonderful perhaps on the first couple of hours. If you have a friend close by that can bring some different wire or components
I would try that.
Good luck regards.
Y net is your speakers are more resolved than a bunch of your equipment.