I got a new Song a95L TV that is 65 inch. The installer placed it to where the center of the tv is about 56" inches from the floor.
My installer (me) took this tack:
The bottom edge of my 75" is 30 inches off the floor, putting the center about 48 inches, which doesn't make your 56 inches seem particularly high. It couldn't go any lower due to gear under it.
A bonus, since I generally view it while taking a nap, is that it is centered between the sidewalls.
And since speakers need to be pulled out from the wall behind for good imaging, I figure that might be good for other kinds of imaging and the screen is 46 inches from the wall behind (flush with the front of the gear rack).
It tilts down just a little, a possibly fortunate happenstance that came with mounting the TV to a telescoping swivel extended 15 inches mounted to some angle iron mounted to the vertical steel of the back of the audio rack creating a little sag.