If you don't like the aspect ratio, don't say it would be better at full frame. If you don't like the AR, use your zoom feature to make it full frame, but try not say 3D movies are better in full frame opposed to cinema-scope. Its your preference, not everyone else's. As for the movie, I did see it in 2D and wasn't blown away by it. I did however see it in 3D recently and saw why people liked it
The T-Con board is the timing control board. The lines that you are seeing could be the tab bonding being loose on the LCD itself, but the best way to check is removing the bezel and testing by applying slight pressure to the bonds in that area of the screen. The screen flashing is could be T-Con board related too though. Try to see if the tabs are weak, if not, might be a bad panel unfortunately.