Well, it's character specific, does less damage than a standard j.D reload off of a Fatal 4D, and is much MUCH harder than the standard j.D Reload combo.
The only advantage it has over the standard, is the fact that it is corner to corner, and it may give a little bit more heat, and if you're in the corner anyway you get better damage and heat by doing a confirm into Assault Through back into the corner you were just in. If by chance you're not in the corner, then the standard j.D reload combo will corner carry the rest of the way anyway.
Basically, there is no REAL reason to do that haida combo for anything other than pure swag. Which is a perfectly reasonable excuse to do it imo ;3