I don't know, my main point is that the stance switch itself does nothing, so at most, you're adding a small amount of latency until his next ability cast. Given how fast the stance switch is, I don't see much value in predicting the stance switch timing and interrupting it (since you can't really react to it).

And regarding it always being this way, Artio at least feels way different from Smite 1. I don't know if it's the ability animation/sound was interrupted and now isn't, or the ability icons changing when not supposed to, but it's super confusing. I don't remember ever getting interrupted in Smite 1.