My thoughts now I've seen it a few times and read others opinions:
Luke
Ruined and wasted. It’s Luke freakin Skywalker, and he’s given so little time and presence! Him throwing the saber away was ridiculous. I could understand if he was really emotional and dropped it and walked away.
His death was done well I thought. Very poignant with the binary sunset in the background and The Binary Sunset music.
Rey
Total Mary Sue. I was prepared to forgive this if it turned out she was the child of someone powerful, which I think is what JJ was setting up. I suppose he can retcon that in Ep9.
Snoke
Rawr I’m big scary Snoke! Ah crap I’m dead
Phasma
See Snoke.
Rose Tico
Just **** off.
Finn
His arc was the same as Ep7. Tries to run > gets persuaded to stick around > does something heroic.
DJ
Love Benicio del Toro, liked the character, and hope he returns.
Canto Bight
Canto Shight more like! Hardly any Luke, and no lightsaber on lightsaber fight, but we get this crap? **** off.
Leia - Mary Poppins
Well, that was terrible. I agree we needed to see her use the force, but that was bad. I would have preferred if she'd reacted instantly on the decompression, and maybe saved a few of the bridge crew, including Akbar. Perhaps held them all in place until a force field could be put up.
Senile Yoda
**** yeah!
"Page-turners they are not!"
Kylo
Developed ok.
Knights of Ren
The who of what? Guess they're not a thing now.
Humour
The only humourous part I really didn't like was Rey force pulling the saber in Snoke's thrown room and it hitting her in the head. That was just goofy. Poe trolling Hux I thought was ok as that's Poe's style. The other wisecracks were ok too.
JJ may have been over cautious with 7, but it definitely felt like a Star Wars film. 8 not so much.
In short, Rian needs to meet with some kind of Sarlac related death. That's if his Death Star head will fit.