So, I don't have rider numbers, but I do track and record FP return times like it's my job. During June, Soarin' FPs were running out at a faster rate than they had as World (proportionate to the other FP return times at DCA - since June was fairly uncrowded, they were actually running out later in the day, but their popularity ranking at DCA/the resort as a whole was higher than normal, if that makes sense). During the rest of the summer, though, it evened out. So it kind of seems like when they announced that it was just for June, it did draw more people, but then when they extended it, it behaved more like World. Based on that, it seems like the smartest move for them is to bring it back on a limited-time basis periodically. (I greatly prefer CA to World and wish I could say otherwise, but that seems like the logical move from a business standpoint.)
In addition to those jarring scene cuts, the fact that the Taj Mahal scene is 100% CGI just annoys me. There are a lot of cool places in the world to actually film, and, ok, adding your digital animals all over the place is at least possibly "ambiance," but to 100% fabricate the actual landmark seems so unnecessary.
To be fair, though, the original CA version does have digital elements (like the paraglider and the golf ball), but obviously the World version is much more CGI.