After reading this thread, I started looking into some of the claims that have been made.
First, I'll say that PNC Park and Busch Stadium need help ASAP. As someone mentioned earlier, it might of been in another thread, it looks like the Pittsburgh skyline is in a blackout, like "someone forgot to pay the electric bill."
St. Louis isn't fairing much better. There's some obvious problems with the lighting in the outfield stands and concourses. Some things are lit very well, like a couple of brick columns, where as other things are completely dark.
I took a look at Minute Maid Park to see if it was noticeable there. It's noticeable, but not nearly as big of a problem as in the other two stadiums mentioned.
Here are some screenshots that illustrate the problems.
You can see there's one tiny spot under the small scoreboard that is lit. When in actuality the lower portion of the the third deck should be almost all illuminated.
You can see how it's actually lit in the photo above. Also note the restaurant in deep right center field. In real life, it is illuminated more than it is in the game.
I think the most glaring lighting issue is the skyline, just like in Pittsburgh. For whatever reason, none of the buildings have any lights on. I'm not sure if that just wasn't coded it or what, but it's pretty noticeable.
Here's a good image from when they're doing fireworks after a Friday night game. It really stands out because they turned the lights off in the stadium, but I promise you all of the lights in office buildings are not turned off. You can see the lights on during the night games in real life, just not in The Show.
I used the Astros stadium to illustrate some of the lighting issues, but by no means is it the worst. In actuality, I'd be okay if they turned their attention to PNC Park and Busch Stadium and some of the other more problematic stadiums rather than spend time on Minute Maid Park. But at least this illustrates similar issues other stadiums are experiencing.
For the most part, the game looks fantastic. Not trying to knock the developers. Hopefully some of this is just a bug and can be easily patched. If not, perhaps extra attention could be paid attention to this for The Show '15.