it does have a tiny bit of light bleed at the bottom that's only noticeable when looking at an extreme down angle at the TV
I'm sure most if not all of them have this at close range and odd angles, but if the set looks good from a normal seating position then you got a good panel.
clouding should have no bearing whatsoever on the picture, shouldn't it?
What's DSE?
LCDs are constructed out of several layers. Clouding is an imperfection in one of the layers such that when light from the LEDs is emitted, a hazy white patch or pattern will appear over dark or black backgrounds.
For example, a set affected by clouding will see these "clouds" during a space scene in a movie because the background is mostly dark and yet light is being emitted by the LEDs so that the stars are illuminated. If the LED turns off entirely, like on an all-black screen, you wouldn't see it. Basically, if you don't see the "clouds" during dark scenes while watching content, you don't have clouding.
DSE, or the Dirty Screen Effect, is a similar imperfection in the panel where certain sections will have a slightly smudged or dirty appearance, even though the screen is clean. This is usually only visible in panning shots over lightly colored backgrounds such as blue sky, clouds, a soccer pitch, anime, etc. DSE is very common in large format LCDs. Due to imperfections, the screen is ever so slightly darker in those areas. This can be a real problem for games where you pan the camera around bright scenes (i.e. looking around the sky in Skyrim) It may be so slight that you only notice it out of the corner of your eye but disappears when you stare at that section because your peripheral vision is more light-sensitive than your direct gaze. You can look for DSE by using a series of gray slides going from lighter to darker but I advise you not to look for it as it is one of those things where if you know where it is, you will constantly look for it while watching.