1. It will ease reading. It's currently terrible, you might be used to it but we aren't.
2. It will sharpen the text and make it easier to read since there's less to encode into the GIF format.
Additional recommendations: remove the useless part on the right—I use Arch BTW vibe—and make the font bigger.
With difi the TUI made for git diff it allows to me speed up the review process and make it more enjoyable.
For the nvim integration, there already exists diffview and code diff, but I still favors the github website's solution of highlighting + and - inside one file rather then side by side.
difi: https://github.com/oug-t/difi difi.nvim: https://github.com/oug-t/difi.nvim