So after trying to switch from fingers out, and resting lightly/dragging as my wrist moves, on the guitar, to tucked in..., I found that just too hard to retain control, especially when picking higher up the neck.
But I saw yet another You Tuber teacher, (and he's BADASS), saying you want your fingers tucked in. (Ozz Guitar, if anyone's interested.) I've watched plenty of his videos, so I can tell he knows what he's talking about.
Anyway, like changing any aspect of your technique from what you're used to, it felt unnatural, but this time I'm sticking with it, because I
am noticing improvements in what I can do.
I do have to go back to a slower speed on various licks, and retrain that muscle memory, but I'm definitely digging the change. I'm also finding that having my fingers tucked in helps give me more hand surface to use to mute strings.
One of these days I'm going to do a video, if for no other reason to have something that I can look back on when I'm old.