Speakers sound too bright.

Clarification:  the AMT design has a wide horizontal dispersion pattern, narrow vertical dispersion pattern. Therefore, no ceiling/floor reinforcement, but possibly side wall reinforcement.  

Besides brightness/harshness, what else do they clearly do wrong ? New not burnt-in equipment and cables can do many funny things at the same time. I can't know if this is the case. Find a few very high quality recordings and see what they do with them. Don't even listen to them for longer than a minute at a time before you get at least 50 hours of play. I suggest starting with low volume and then gradually increase it to moderate while accumulating hours. Don't push it.

I would think it would be premature to return them unless they just sound like a complete junk. This pair might actually be defective. So yeah, I would give it a try.

Any new speaker will require 100-200 hours of break in.  If you replace them have you thought of used speakers or store demos that have some hours on them.  
It’s painful for me breaking in new stuff which includes cables because I’m so impatient.

Brightness (lack of) is not usually what improves with speaker break in. What you normally hear in brand new speakers is a "tightness", the speakers don’t swing and let go of the notes. And the bass can seem somewhat lacking, the bass and midbass fill in when the driver suspension loosens up.

That said, a speaker can sound top heavy if the bass isn’t balanced with everything else. A tweeter will sound more prominent in a bass shy speaker. That could be what you are hearing and that just might change with more hours.

How long can you keep the speakers and still exercise the return option? If you have time, put a track on repeat while you are at work and let ’em rip for a few days. If they haven’t come around after ~200 hours, send ’em back.

@rwalsh07 "Pretty much bare wall, no room treatment, flooring is a mixture of carpet and laminate flooring." There's the vast majority of your problem . 

Until you address the room, there's nothing any tweek, speak, or electronics change can do that will help in any meaningful way.