None of this save for artifact traits is true tho, you will not be replacing full Antorus raid gear and your artifact with the first quest greens you get. The people testing alpha right now are using template characters that start with crappy greens and can't just copy their toons over. In reality you won't replace your artifact until you find a full I lvl upgrade (close to 110, and probably from a dungeon), you will still level up with legion legendaries and you won't just instantly replace tier gear with greens.
The people playing the game on live right now that are massively complaining about things on Alpha BFA because they were expecting the game to feel more or less like it does now on live, even tho on Alpha they're playing buggy content with no add ons and characters in full shitty greens and so on are exactly the people that won't be invited to Alpha next time.
People have been more or less describing every alpha ever. Most of those people are going to find the leveling content boring no matter what.
Let's recap the purpose of Alpha:
1. Early testing of Leveling Quest/Dungeon Content
2. Early testing of classes/specs at intentionally lower power levels
3. Early testing new game systems
You can't even get to Max Level in Alpha let alone obtain a decent set of starter gear for a level 120 character...hell you cannot even play Alpha BFA with the gear your live characters currently have. I've been watching the development of all the classes/specs I usually main and I have absolutely no reason to believe I'll have to switch, nothing looks even slightly out of the ordinary.
That doesn't mean I have no criticism of the things I have seen and know about, but the only thing I've seen so far that's been a huge let down is the Alliance side questing experience.
I mean...on the Horde side the story is believably escalated from "you have defeated the Legion and are now back on the trail of some old god/titan shit" on the Alliance side it's literally "you have defeated the Legion, now go collect 12 bear asses and 10 ounces of squirrel droppings and some twigs and shit".
It's hilarious watching people in 2018 that expect a new WOW expansion to practically feel like a brand new game or else consider it shit tho.
Take notes Blizzard: these aren't the people you want in your Alpha anyways.