Given McGoldrick's recent run of first-team goals, I'd now be inclined to agree with you on that one.
Previously, DM hadn't shown that he could score goals at this level, so he couldn't be relied upon as the "pacey" option up front. Wright-Phillips has had that role pretty much since he arrived at the club and managed to keep a place at least in the 16 if not in the starting 11 on the basis that he was the only option for an injection of pace up front. It's entirely possible that we now have a better option in McGoldrick. It is also, however, entirely possible that this is a never-to-be-repeated purple patch for him...