One thing I really wish the Flash TV show had done, was an effect that was often used in the Silver Age: show the Flash moving normally, but have the entire rest of the world "frozen." This is not a very exciting effect in comics, where everything is always frozen.
And that creepy season finale cliffhanger with old school great Gorilla Grodd? Trés Magnifique!
That effect would have been hard to do in 1990. As of the 2000s, that effect was used twice in the early episodes of Smallville. It was awesome. Unfortunately, it was apparently crazy expensive to do, so they did it only once during the first and once during the second seasons of the show. Shortly thereafter, I stopped watching it anyway.