I don’t think Gray Jedi is the solution. You can’t say the side that destroyed planets, purged races, and slaughtered children are half the good guys now, and the people doing everything to stop them were partially in the wrong.
https://en.wikipedia.org/wiki/Blind_men_and_an_elephant
Just because the Jedi and Sith can experience the Force doesn’t mean they can know it perfectly or wholly. A most robust understanding of the Force may lie along a higher synthesis of their philosophies.