I remade my longest running character using 2024 rules just to see what the differences were and while a couple options weren't available, the added options are very nice but still make a lot of sense.

Weapon mastery keywords are awesome

And now I can actually show the mechanical benefits of rage in D&D Beyond! There's an option to select when you activate rage!!

switalia relevant to Mr. E. givemedragons Idk if you have any barbarians but maybe you too??

I overall like it, too. I have a few small quibbles, but overall they did some pretty cool stuff along with a general tidying-up.

I'm trying it out with my D&D group and I've converted a few characters (while keeping their 2014 subclasses)

no barbarians, but i've done a rogue, warlock, cleric, ranger, and bard

My favorite thing is the rage activation lmao

Barbs are the most mathy class, change my mind