I am not impressed by the celebrity consultant tie-ins and the two you mention are particularly underwhelming to me. At least someone like Jacques Pepin really does has the gravitas to effect the cuisine on a cruise line.
A friend of mine from high school days recently retired from a lengthy career as an NFL strength and conditioning coach for several teams. Nobody outside of the NFL would know his name but I'd rather have my friend develop an activity plan than Dhani Jones. At least my pal is trained to to develop such plans.
I'll wager the Quantum Of The Seas will be getting some air time on The Travel Channel as part of the arrangement with Dhani, likely as an installment on his series.