The difficulty is perfect. Frankly, it could still be a little harder and still be good casual content. If you're struggling, make a PF and ask for help. This game is FULL of people who LOVE to help and explain how to do the content, or even be happy and willing to carry you through the content you struggle with if it feels hopeless on your own. Genuinely. I can't tell you how many PFs I have joined specifically to help people through the content they struggle with, and I know I'm not alone bc those PFs always fill up FAST.
And frankly, the idea that it's "too difficult" is not an accurate assessment. You are too used to the game's difficulty being tuned way down, with EW being the easiest the game has ever been, and too used to running content while being heavily over-geared. Now that a new expansion has released, everyone is running at min ilvl, which means things are the hardest they're going to be, for now. As time goes on, things will get easier as better gear becomes more widely available.
Personally, this has been the most fun I've had in the game running dungeons and raids so far. It would be a tragedy if they were to tune the difficulty down, so please don't do that.
I do want to say there is an argument to be made (and should be made!) about there not being enough accessibility features for people with light sensitivity or color blindness, and tbh I feel like all these discussions about "difficulty" always distract from the actual bigger issue of accessibility. If there were more accessibility options (ability to change aoe colors, arena colors, saturation, brightness intensity, etc.), that could also HELP with people struggling to see the mechanics who may not normally "require" accessibility features. But instead we're out here, asking for the content to be nerfed instead. There needs to be a wider view when looking for solutions instead of "too hard, make easy?".