Not even a teeny weeny minor improvement. It is just about perfect. There is nothing to improve. I attempted to calibrate it but gave up. Nothing I could do would improve it so I leave it as it comes out of the box. Yes 3D is dead and I don't care. It returns with regularity every ten years or so and then dies again. It will be back. Meanwhile I still have a 100 3D movies and a few hundred on Amazon I have yet to buy.
I have a friend of mine I have known since the 60s. He is an audio engineer. He cannot put on a record, disc, tape, movie or piece of software without going immediately to the control panel and adjusting everything there is to 'improve' the sound or picture. And the funny thing is he never fixes anything. It never sounds or looks better, just different. I learned a long time ago not to mess with the controls. Modern movies and music for the most part are engineered pretty darn good. If I change anything to make it look better then I screw up what the next one looks like.
I have been an audiophile and a videophile for well over 50 years. I have had nothing but outrageous audio and video systems most of my life. I watch and listen to my system every day. One thing that bugs me is that other audio and video fans will spend a lot of money on a component and then rave about how it made a huge improvement when in reality there was no improvement. But they have to lie to themselves to justify that outlay of money.
Back in the 80s I had a 3 car garage I turned into my sound room. Big screen TV, a pair of Boston Acoustics A400s, and all the rest of the outrageous stuff to make a sensational sound and video system. I spent a lot of time on the acoustics in the room. Thick carpet, drop ceiling with acoustic tiles, etc. One day several of my audiophile friends came over to hear some new thing I had just got. After listening to one song (let me repeat that after one song) one of my friends announced his CD player sounded better than my CD player. Now that is just about as stupid a conclusion as you could arrive at. Ever since that day I stopped listening to people telling me how to improve my system. It is perfect. If you are ever in Orlando stop by and I will dazzle you. But meanwhile do not bother to try and tell me how to improve my system. I will only laugh at you.