I would consider a more substantial mantel, and maybe even add the look of built ins over the top part of your fireplace, to reduce the amount of visible stone, would also allow for the tv above the fireplaceYou could use the built in over the fireplace to the left and also on the wall to the right to balance your fireplace and enlarge mantel.

If you like the asymmetry of the fireplace then enhance that with a large mantle across the entire length to enhance that design or as in this image, balance off the fireplace with a large sculptural piece, and I would make the mantel a bit larger than in this image. perhaps from the right side of your fireplace, and equidistantly on the other side.

If you do not like the brass, you should be able to spray paint the door and surround with a fire proof spray paint, consider a professional for this. I think you should be able to paint the grout as well

Elaine has the right idea about beefing up the mantle, but frankly, the stone job with those huge grout lines was not a good job to begin with. You have to decide if you're going to spend some $$ on this project. Also pull out those brass doors.

Brass is making a comeback, but is too formal for your chunky casual FP, so replace the doors, or simply add a black screen instead. You can add a huge mantel of rough sawn lumber or a log, it the stonework itself doesn't bother you. It can be slipped right over the current mantel to help support it.

For the record: I agree brass is back but never like this or this finish and always in more modern homes. (I would hate for an innocent bystander to read "brass is making a comeback" without proper design direction, hehe!)

From one diy gal to another, it would be something I would be willing to pay a little extra for. I'm not sure I would paint it, I think the grout lines my look more prominent but then again, it may look great. Once you paint it, there really is no going back without removing and replacing the stone. Definitely update the mantel. If you or someone you know is handy, you can use the existing piece and wrap it in 2 bys (they have a good video on YouTube for this) or use a solid 6x6 piece (may have to trim the depth of it).

They sell heat paint (we bought the brush on kind) I can't attest to its outcome yet since it's practically summer here, you have to light the fireplace and heat it up once it's done and it's HOT in Alabama!!

I second the large sculpture or item to one end to make it appear more symmetrical. I actually love that style for that reason. It allows for an eye catching nice piece to be added without taking up wall space.

I hate glass doors on a fireplace. What are they for? If it's to block the draft then the flue needs a better damper.

Thank you all so much! Black would be great for the doors and a heavy more substantial mantel would be quite nice. Painting does seem risky. Maybe these couple of changes would improve it enough!!!

No gray or silver on the new chunky mantel, and no puny stuff. This fireplace needs hefty decor.