I've seen people criticize the difficulty of the current expert dungeons already and while the natural response is obviously to simply say "skill issue" I think it's important to look at what makes them difficult. In my opinion the difficulty comes mainly from there being little mechanical downtime, stuff is just happening and when the previous mechanic ends, the next one is already starting.
This is something the endwalker alliance raids have critically failed at. Rapidfire mechanics can make even easy encounters with simply mechanics feel engaging and I am glad SE has realized that (atleast for the current dungeons). We need more normal mode content design like this. I dont think the ability to simply power through the vuln stacks is a big issue either since it's more fun to engage with the mechanics honestly imo (and it keeps the encounters easy).