for example, after Carrie's destruction of the school she pretty much lays waste to the entire city. I really thought that, with increased special effects technology, the new version would show this.

Sue being 'good' (and coming back to visit at the end) ruins the isolation of Carrie. She isn't alone in 2013.
The telekinesis practicing is learned-curiosity Matilda-y, not brought-up-scared Carrie-y.
Locking her mother away (blatantly showing her powers) is a teenager exerting power, not brief child rebellion. Rather than her saying 'I'll be OK', now she says 'Up Yours'. Which seems wrong.
Since Sue and her boyfriend are nice, and ARE being nice to Carrie, that ruins his rejection of the plot and revulsion at his "friends'" actions. Then, he knew he was involved but recognised they went Too Far and that Carrie was alright; now he just reacted to an unknown thing happening.
Carrie's showmanship during the Prom completely ruins everything: she is no longer reacting striking back at bullies, she is deliberately revelling in mayhem and murder.
Moreover, that in 2013 they ARE laughing at her, a) is daft, but b) somewhat justifies her. However...
...the non-complicity of all but two-ish in the plot against her makes her having a go at them a crime, not punishment. In the seventies, she's driven mad and ey deserve it. In 2013, she's aware of her actions and they do NOT deserve it. Specifically, in the de Palma version, pretty-much-everyone is a bit mean to her, including the teacher who wants to slap her. In e Prom mayhem, the teacher (presumably) dies, but as a bystander. In 2013, the teacher is on her side, but it looked like she was still singled out for attack.
The car crash at the end was pointed, malicious revenge in 2013, whereas in the original it was reflex and self-preservation.

That last point - added to the preachiness and unnecessary explanatory parts ("remember Gran had powers, it just skipped a generation with you" ugh) - really sums up what was wrong with how the remake was executed: it wasn't the logical reactions of a scared, naive and brainwashed child, it was the deliberate actions of a suddenly-aware-regardless-of-logic teen intoxicated with power. Sissy Spacek was scared of her mother, her peers and her power. Grace thing overcame all her fears, unless Plot required otherwise. Piper Laurie was driven mad by a twisted grasp on religion and self-loathing, Moore was self-harming and angry, with an undercurrent of religion.

The fact that they had to copy the jump-scare of Carrie's hand to frighten Sue. You wouldn't get that from the book; you get it from the earlier movie. But of course the remake has to try to outdo the original (by the hand not coming from the grave, but Sue herself).

Carrie reads Sue's mind and sees that Sue meant her no harm and wasn't setting her up.

the way Carrie killed her mom, and Sue never went to the prom.

Carrie's mom giving birth. Rocks falling from the sky after little Carrie talks to the neighbor about her "dirty pillows.")

This comes from the original novel too, so maybe I didn't give them enough credit for doing a new adaptation instead of a remake of the first film.

If he knew, why would he stand under a bucket that's going to hit him on the head and kill him?

It was always about revenge on her classmates for a lifetime of bullying. I'm actually surprised they were allowed to make a new version of the film because of that.

And I don't think the gym teacher was killed. I think Carrie just pushed her away.

Billy was trying to run Carrie over.

Another thing that was in the f'ing original novel (except it was Carrie's mom's grandmother who could move stuff with her mind).

Mom's self-harming (and her weird religion, and calling her pregnancy with Carrie "cancer") - from the book.

a scene not in the novel.

tell people to vote for Tommy and Carrie.

the surviving drifter character punching out on the clock as he leaves the building after defeating the monster.

basement being cleaned, and them discovering the tunnels below the factory

town destruction