What's so great about the eye? It could easily be improved and many animals have better vision than us - more distance, ability to see polarization and UV, no hole in the middle our brains have to patch up, that saccading hack, etc.
There was this notion that the human eye, in its astounding complexity, couldn't have evolved gradually, but had to have been created all at once, called "irreducible complexity".
The saccade bug/feature is really neat. I remember reading a whitepaper a couple years back on how it was being leveraged for foveated rendering in next gen VR headsets. Cool stuff!
The dynamic range is quite good though.