It's just not an interesting attraction (sick factor or not) . and frankly (besides remembering how ill you get) .. not very memorable.
Even if I hadn't gotten ill on it, I wouldn't try it again. It isn't thrilling, it is more anxiety-inducing. It reminds me of a space flight simulator that you'd find in a museum. I feel like it could have been more exciting (and accessible) if it was just another 3-D simulator like Star Tours or Body Wars.
A lot avoid it because they hear it is nothing special AND it makes you ill.
With as few attractions at Epcot and the 'forced' tiering though, I am sure this sees a lot of traffic simply because there is not much else to do at that park anymore (attraction-wise).