I'm not sure I agree completely with the basic premise of the article and the example squad is...weird.
2-dice attacks have never been good, except possibly in the very early era of x-wing. All 2-dice attack squads that are or have been successful have had extra help in the form of Howlrunner or Crackshot. Also, I find the idea that ships without Boost/Barrel Roll being unable to see enemy ships with those actions to be ridiculous. It's simply hyperbolic to assume Soontir or Dash will always be able to get out of arc of their enemies.
The example squad of 4 X-Wings doesn't make sense either. Why would one assume it should be good in the first place? "At first glance, this list has what it takes to deal with a Palp-aces dominated meta." Does it? I'm not sure anyone vaguely familiar with the game would make that claim. Granted, you could argue that's partly due to the problems Theorist highlights but I might as well say 4 Tempests with AC and Prockets should be good - look at all the dice they can throw!
I won't deny there are some issues with the game currently with Palp Aces and Jumpmasters being too dominant but last year you could say the same about Fat Han or RAC Soontir and they're nowhere to be seen now. I'd rather a situation where all ships were viable in some fashion but X-Wings have never been great outside of a few specific pilots so picking on them seems strange. Ironically it may well be that the new Fang fighter brings more options for the kind of game this article is lamenting doesn't exist.