Physics in starwars has always been shitty. Travel time was a huge flaw in TFA and rogue 1, negating any drama, or logic for characters and entire fleets to teleport across the galaxy... This one was better at that.. however...
Bombers in SPACE, use gravity to DROP bombs? wtf. bombers have existed in starwars for some time, why this idiotic change?
Rebel ships are faster then Order.. but can't lose them.. what? AND, they run out of fuel and slow down...? again, physics in space..
Logical and tonal problem here. The sequence sets up the Rebel fleet in a chase.. ok great... while small ships just come and go? and travel to other planets? the fuck? you can't have this dire chase, and just have people leaving the fleet at any time. That entire chase sequence falls apart at that shit. They all could have just split up. in fact.. why DIDN'T the fleet split up? each ship light speed off in a different direction?
The next problem skip to the finale a bit. The lightspeed crash. Its one of those things... Why wasn't this done before? you introduce this tactic now. there are a hundred times in previous movies, in THIS Movie, that would have solved many problems.. Light speed a capital ship into the deathstar, the Executor, the first order base... again, in this fucking movie, TWO ships are lost when they ran out of fuel, with full accompaniments of crew... no evac of those ships... And.. just gave up. how as "turn the ship into a fucking super missile" not an option previously? its one of those things you should never bring up, because its creates these problems. Its too easy of a tactical solution, so the answer is "deflector shields protect from that"
There was tonal problems with that as well. Slow motion. silent/black and white. fast action/slow motion with rey's visions. This movie introduced many visual tricks, and cinematography not typical to starwars. And tonally within the movie, all over the place.
Story had the same problem. you can't go from the cartoonish prequelesque CGI of Finn and rose riding the horsedogs, riding the AT-ST, etc. then, have scenes with any emotional weight, like they were trying there. Poe trolling hux fits in here. while I think the trolling itself was fine. it was a joke that went on too long. Esp with Hux being shit on the rest of the movie as well.
The new order needs to do something truly vicious to be taken seriously. (both personally, and on a galactic level. Huxley should outright murder at least one main character in the next movie. like Finn, Poe, or even Rey. Reverse the Han/vader scene. Rey gets brought in and meets Huxley face to face. and he immediate pulls out his blaster and shoots her in the face. no one liners, just shoots. ) Leadership is intentionally kindof incompetent. It will be pretty awesome if they suddenly get their shit together. It was a real mistake to not have them do something in this movie.
That is part of the problem as well. This movie ends with "we are the spark of a new rebellion". What spark? what happened in this movie to spark a new rebellion? nothing. you just got your asses killed. theres 24 Rebels left in their entirety. how are YOU starting a new rebellion? passing the torch at all? and with what message?
TFA did end with a reason for rebellion. The first order nuked the core worlds(not actually core worlds, but the 5 which held the senate for the new republic.) THAT would have been a reason for unrest, and new Rebel worlds. It was never mentioned.
I think there were a few other things, but I forgot them already.