No, but pitchers do make adjustments to adjustments and I'd be interested to see how he continues to progress. I love Rafaela, and he's certainly exceeding expectations to date and I love what he's doing but the approach is still concerning. It doesn't mean he can't keep up what he's doing, it's just rare that someone with his profile can, but maybe he's that rare guy that will.
Improving his BB% is exciting, but 4.6% is still very low. I think he has the 12th lowest BB% in the majors. Which again, is an improvement from the worse, but still bad.
Don't mistaken my critique here, he's on pace for to have over a 5 Fwar season, if he can do that he's worth every penny and more.