Just a quick solution concerning blurry fonts on the DDIs:
In ...\DCS World\Mods\aircraft\FA-18C\Cockpit\Scripts\Multipurpose_Display_Group\Common\indicator\MDG_strokesDefs.lua
change the follwing values:
Old:
stroke_thickness = 0.8
stroke_fuzziness = 0.5
New:
stroke_thickness = 0.4
stroke_fuzziness = 0.2
This will enhance the fonts and make them more readable.