Had some more thoughts after watching an edit:

Going in to TLJ I felt that guilt over Kylo Ren was sufficient motivation for Luke to self-exile. That was how Han explained it, and there wasn’t really any need for more. He doesn’t need to hate the Jedi or think that they should end, he could just think that he’s not a good enough teacher and that further pupils would turn to the dark side. The basic structure of this is already in the movie with him being concerned about Rey (“you didn’t even stop yourself,” Rey hanging out with Kylo, Rey going to the dark side hole, Rey lacking restraint with the saber) Rey saying “Kylo failed you, I won’t,” and Yoda telling him about failure. No late night attacks, lying, or book burning required either.
The deleted scene with the “raid”/party in the caretaker village could be re-purposed to teach the complete opposite lesson; instead of teaching Rey that the Jedi suck because they stop you from making interventions, he could just be giving her the straightforward lesson the Jedi intended, but in a sarcastic mocking trickster way like Yoda. Or, maybe it’s a metaphor to show Rey why he stays on the planet and doesn’t intervene in the war.
Aside from the part when he actually goes with torch in hand, Luke is genuinely concerned with actually keeping the Jedi traditions alive: he carefully folds his robes, describes himself as part of the religion, and speaks with reverence about the ancient Jedi texts. It’s possible that his motivation for exile could be to simply protect and watch over these teachings and make sure that the First Order doesn’t destroy them. He’d like to get away and all, but he’s just one man… he slips into the complacency that he had when he was younger (“it’s all so far away from here.”) Han being killed and Leia being threatened could easily rouse him out of it without Rey having to follow him all over the island and pester him. The projection could be a way for him to stay on the island and watch over it while still helping.
Since any of these changes would cut out a substantial chunk of TLJ they’d probably be best implemented in a 2-in-1 edit.
Maybe he genuinely didn’t know that the situation with the First Order was so serious and figured that the Republic could handle it. He could be willing to help from the start and just require a messenger. This way he could be the MacGuffin that TFA makes him out to be, only for a 2-in-1 edit where he blows up the First Order fleet. Or, in a longer edit, he might want to teach Rey first so that she learns the lesson of restraint before he makes such a huge act. Or maybe he’s convinced that Rey is already lost by trying to save/join Kylo Ren on Snoke’s ship and he’s trying to take out them both! who knows, just spitballing ideas.