The Crimson Binome
Hero
Nothing on that list adds value to my campaign. I prefer things to be a little more Tolkien-esque.5e brought from 4e the Dragonborn,, 4e-style Tieflings, Eladrin, and Warlock, the Shadowfell (with the Raven Queen and Shadar-Kai), the Feywild (with mention of a few specifically 4e Fey lords), the Elemental Chaos, Primordials (albeit only one stat block so far), the Dawn Pantheon, and a few of the monsters such as the Archons (renamed Myrmidons) and Star Spawn. You don't like a single one of those? I mean, that's your right, but...
Honestly, aside from the dragonborn, the rest of that list could be summarized as "crazy magic nonsense"; and even the dragonborn are a little far out there. It's fine if you're playing in an absurd ultra-magic setting, like the Forgotten Realms, but it doesn't fit with anything more mainstream.
I like the proficiency system in 5E, and the half-level bonus that came before it. I have nothing against a wizard and a fighter having the same chance to hit, all else being equal, because those other things are rarely equal.IIRC, he's not a big fan of the Proficiency system and Hit Dice.
I hate the concept of Hit Dice and healing surges, along with any game mechanic which hinges on the idea that a hit (within the game mechanics) isn't really a hit (within the narrative). The whole reason I'm relying on a huge system of game mechanics is so that it can tell us what happens next, whenever we take an action; so game mechanics that exist primarily for their own sake, without codified meaning within the narrative, are kind of pointless. Likewise, I'm not a fan of the whole "change any fluff you want, because the mechanics are the only thing that matter" thing.