I think this is up to you to tell us. When done correctly, this type of picking motion doesn’t feel effortful. It doesn’t feel jumpy or bouncy, and there is no tension buildup over time. When you look down at the hand itself - not necessarily the fingers or the pick, but the hand itself, you almost can’t perceive the up and down component of it. It just looks like the wrist is moving side to side, even from player perspective. If these things are true, then you’re good.
On a related note, there are probably degrees of this. Something like 1003 or 902 might be the flattest motion path you can make and still actually get out of the strings. But something like 901:30 or 901, while still technically “crosspicking” might not feel as smooth, and you might experience more tension build up over time. I suspect there are players who make slightly more angular motions like these that are still “correct” (loaded term) for their application. Like on mandolin, for example, where the strings are really two strings, and you might not feel as free to make movements that are as big and flat as you would on a guitar. That’s a guess but I think that may also be true.
So again, how does it feel, what does it look like to you - those are the determinants. And have you tried the roll patterns, and can you get them flat and smooth?