I don’t think the Nari scene is necessary, since it’s main point is to show that Kenobi himself has fallen into depression and has become jaded about everything, willing to abandon his moral conscience out of cowardice borne of his PTSD, which doesn’t seem to be as much at the forefront of this edit. This Obi-Wan is more practical, I feel, but driven by his sense of duty more than anything. There’s hints of his having become unbalanced (his inability to communicate with Qui-Gon, for example), but that’s more of a side thing than the main point.

The only other useful thing about that scene is setting the idea up about Obi-Wan burying his sabers in the sand, but I don’t think it’s that big of a stretch to just cut to him retrieving them once he’s resolved to leave like in the edit.

Really, Nari as a character was so mishandled because they decided to show us him through the Inquisitors’ POV rather than his own. If there was a scene of him heading to Tatooine or giving any explanation of the journey he’d been on since Order 66, I’d probably feel better about leaving it in since it’d be set up better. As is, I think his appearance only really works in this context via the Inquisitor scene in the cantina.