I think this assessment is largely accurate -- some people who had already developed a liking for some or all of the previous
Disney Cruise Line ships were disappointed in the Wish because it didn't have all of the features of those ships. Some people like the Wish better, and some like all of the ships for different reasons.
I would not cancel your first Disney cruise just because some people didn't like the Wish as much as they did the other ships. Take your cruise and see for yourself whether you like the ship for what it is, not what it could have been.