If you're on AMD, try using the radeon image sharpening and set it to like 80% that can make a MASSIVE difference. I'm sure there's an equivalent on nvidia as well
Reshade also has some sharpening filters that you can apply.
Will also suggest running the game on vulkan rather than d3d9 using dxvk-- will give you better performancr and compatibility with recent hardware
As for graphics, there are tonnes of mods that have been created over the years for pitches and improved colour gradients so you might need to dig a bit on youtube.
If you ever get around to using the Sider for PES 2017, I will recommend trying my tool from these forums called Superloader-- that's pretty much the most comprehensive tool for inserting modern pitches, 3d rain effects, snow, graphics mods etc into the game (don't mean to self-promote but it is pretty useful for what you're looking for)