Was he? What is it that he actually did? Isn't he the quintessential example of a pointless throwaway side character that fans of a daft but fun family film imbued way more importance than actually merited? I mean, Snoke had several pages worth of dialogue in both films, and interacted with most of the major characters. Boba Fet wore a funky helmet and loitered a bit. Then he fell into a big silly puppet sand vagina. I mean, I think he did. I haven't read all the tie in novels that explain why that was actually awesome, but as a casual viewer, that's what I definitely remember him doing. No?
See, call me a normal person, but I'm pretty sure that's what they did. Of all the characters in this very messy film to actually have an arc, Luke was definitely one of them. The film I watched presented him as a tragi-heroic figure, who learned a crucial thematic lesson from our Heroine, and chose to use his last vestige of energy/life force/magical nonsense to help his new-trilogy surrogate to the next stage of magical space whateverism. Then he had a big epic cinematic face-off with the big baddie, where he was implausibly badass in the coolest looking location in the film. I know I'm not the biggest SW fan, but I'm at a bit of a loss as to what people were disappointed by? They gave him a whole Ennio Morricone-esque send off. Even I thought it seemed pretty awesome, and I couldn't give a flying shit.
I'd like to think it's potentially even "meta-textual"... Where Ren is the angry fan boy, and Rey the upbeat fan girl, and both of them have to learn they can only progress if they kill/outlive their unhealthy obsession with the past. The whole thing is screaming "get over it!"...Which is something I never expected of a Star Wars film.