The difficulty of Normal Content in this game needs to increase.

[BigCheez]

In needs yes. But not in "just more faster flashier!!!" but in actual smart things, awareness etc...

This.

I don't think boss mechanics need to be harder. They're honestly fine as they are for casual content.

I think damage rotations need to be more engaging, CC and interrupts should be more useful outside of incredibly niche solo deep dungeon scenarios, tanks should need to actually use their defensives somewhat and healers should actually need to heal.