It sounds like you may be conflating pick attack and pick motion. My apologies if I’m misunderstanding. To me, pick “attack” just refers to how much pick hits the string, not how far the pick moves away from the string either before or after it hits it. That’s the picking motion itself.
As far as attack, even though this is not something we have really talked about, when you look at footage we’ve filmed, I do appear to use a relatively small amount of it regardless of the type of picking motion I’m using. Big motions or small motions, wrist or forearm, the attack is uniformly pretty small. I do this by feel, probably like everybody does.
In fact, it’s significantly less than the Speed Guide itself, which is interesting. Because when I play the Speed Guide-equipped guitar, and I feel like I’m hitting the body, it turns out that it’s not because I’m using any more pick on the string than probably other players do. You can see this very clearly in the slow motion shots. The attack is often tiny. Instead, it’s because the motion continues past the string. And again, that’s a whole different thing.
For dwps economy type playing, like Gypsy lines or EJ lines, and especially with wrist/forearm motions, I really feel like I need more motion “runway” below the string to make them work. I feel like the rest stroke requires this to place more pick on the resting string, in order to truly come to a rest and stop — or at least to slow it down for timing purposes, which is what I think the rest stroke does.
And it’s not just me. If you check out this awesome Albert Lee clip for example, you can see how much meat he gets on the rest strokes, which is significant:
I don’t know, but I’d guess he’d be hitting the Speed Guide as well. Whether he could adapt, and whether that change would be positive, I can’t say. Again, I really tried to check myself in the test drive of this guitar because there are unknowns and they should be represented as such, not as one guy’s opinion or impression.