Having seen it twice, I found it much stronger on the second viewing. On the first time round I found the Laura Dern / Battlestar Galactica plot line to be the weakest aspect but looking at it again, It was actually the Poe story arc that let's the side down.
I really like the idea of doing a plot where the heroes don't trust the leadership so come up with their own scheme to save the day, only to fuck up. Unfortunately the film tries to portray Poe as too cocky and taking too many risks because, apparently if you start an attack you should finish it, but it doesn't stick the landing. The pay off is supposed to be in the base at the end where he leads everyone towards the back door to escape and Princess Leia is all "Don't look at me, he knows what's what!"
But for me, as an arc it doesn't quite come together. If it had been Poe who wanted to fly up the cannon, and not Finn and then realises he should lead everyone out it would have closed the arc nicely, as it is, it is just another storyline too many.
A lot of people take issue with Rose and Finn nipping off to the casino but I rather enjoyed that whole sequence, although it was remarkably lucky that they ended up in exactly the same cell as someone who could not only help them but also open the door and yet had not already done so.
The main critersism from people who didn't like it seem to be about Luke. I can see why Mark Hamill said it wasn't how he pictured Luke but I think it works. He had a moment of weakness and regrets it.
I loved the Yoda scene, it was everything I was hoping for with the movie, I've no idea why the prequels ignored that side of the mythology.
The Porgs were great, the humour fit the scene, and was surprisingly dark in places. The porg jumping on the saber hilt as the other one starred ignorantly down the business end was hilarious, as was Chewie trying to enjoy a quiet dinner.
Rey's plot was built on nicely from The Force Awakens. It was more than simply Luke training her exactly as we'd seen before, although I do think she is doing very well for someone who has not even had a youtube tutorial in the force to follow.
The darkside cave was cleverly done yet different from what we'd seen before and I thought the revelation about her parentage was brilliantly handled. I love that the force can come to anyone in this galaxy and not just those with the right bloodline.
Luke's stand off against Kylo was nicely handled, it reminded me of an old joke from Digital Llama Radio about a role-playing group with a Jedi taking on AT-AT's (ignore this if you are not Teague or Owen)
Part of me was hoping Luke would simply push all the walkers over with one wave of his hand. Why do they need to redesign everything all the time? They should call these new ones MON-KEE Walkers (what? Chicken walker stuck!)
Luke's dying felt unfair after the twist of his not actually have been there, although they did set it up when Kylo tells Rey "You didn't do this, the effort would have killed you".
I can't decide how I'd rank this against Rogue One and The Force Awakens, R1 took a few viewings to grow on me and I loved TFA from the start.
I'm sure you could snip ten or twenty minutes out of The Last Jedi and have a stronger and more focussed film but it's far from being the mess that some fans are whinging about.
Roll on the Han Solo movie, Episode IX and Johnson's trilogy!