These are great tips and I’m sure they’d be super helpful for anyone new to D4 regardless of D3 experience. (Also big WW enjoyer here as well, hopefully our build gets some love)
One thing I’ll add in to your list: grouping is a MASSIVE advantage over solo play. If you have a couple buddies online, definitely party up and do some content together.
There’s some great tutorials on how to fix it yourself, though that doesn’t excuse Nintendo from the shit design