i personally dont think that it is a necessary event... BUT if much of the non-cubing community loses interest in watching cubing, as an effect of feel-solving's removal, then the event should not be withdrawn.
it is possible that the "sport" of speedcubing cannot last long without outside support, which is why the audience must be kept happy. i'm sure that no one wants the wca to disband due to lack of support (like in the 80s when the cube craze was over and there would not be another competition for 2 decades --> which happened due to an uninterested public).
On the other hand, if cubing can feed on itself or public interest does not matter, then go ahead and remove feet-solving. it would save time, and some other event/s could be added. maybe even some exotic puzzle (not one that no one knows, im thinking skewb)