The fitness room, class schedule and instructor are increasingly important for longer cruises (that presumably include more sea days). A sufficient number of calibrated, working machines is essential for the independent workout folks. The stretch classes, cardio and toning classes are essential for those who benefit from a structured workout.
Based on my last cruise on Mariner, the equipment needs replacement and/or calibration. More importantly, it needs an aggressive schedule to ensure machines are in good condition and working 100% of the time.
Cheers, Anne