It's fair to question that, and it's a nebulous assertion. I do think that the convenience is a major factor, but there should be an upgrade in terms of S&C in the general sense of how much more equipment/real estate it's getting.
It'll probably actually be of more help to our olympic teams and the rest which are really the ones who will have more usage in months that normally it's harder to train in or for whom there's been less space/time for S&C as compared to their current situation.
Not trying to belabor the point, but pretty much all scholarship athletes at NU (and elsewhere) are on pretty much 365-day training plans and most of them use the current facilities on Central Street for at least some of their strength/speed training, though some will use current on-campus facilities.