Just because you CAN use a photoshop filter does not mean you should. As an example i took 5 min to change up the dress for Spider-Man Fever.
There are a ton of problems w the one i did, but reducing the amount of fonts and drop shadows and outerglows helps it read much better. With Chip Kidd, Tom Muller, Todd Klein, and Rian Hughes available, there isn't much of an excuse.
Comics have some great design going on. The recent Batwoman Elegy trade was gorgeous and had a ton of smart JH Williams III goodness happening. The problem is that Marvel and DC and countless other publishers are pumping out tons of other work that just seems to get slapped together which makes no sense because it doesn't help the cover art shine like it should.
Thankfully it seems the tide is turning, some of us just wish it would do so faster.