I agree, the only reason we are talking about this is because Bautista likely changed his slide to conform to the new rule, last year he would have tried to kick the 2B, now because it is implicitly not allowed, he likely thought, what the hell, I'll give this way a try. Obviously grabbing the defender is interference, and it's almost certainly why guys have (had) historically tried to break up slides with their feet, using your hands to tackle the defender was clearly a no-no. If it wasn't people would have been breaking up DPs with their arms, not their legs all along.