Put simply, Yoshi's New Island throws away that really made the original game so interesting for so many people - its uniqueness. Unlike other Yoshi-centric titles like Yoshi's Story, Yoshi's New Island does absolutely nothing to distinguish itself as a new game.
Super Gamer Dude
Marketed as the sequel to Super Mario World, Yoshi's Island for the Super Nintendo is a somewhat contentious game in certain circles. Some people believe that it is one of the best games that Nintendo has ever made with original graphics and fresh gameplay for the time, while others believe that those same qualities make the game awful and a stain on Nintendo's record. With Yoshi's New Island, Nintendo has managed to do something that I wouldn't have thought possible - they've made a game that doesn't make either camp happy.
Put simply, Yoshi's New Island throws away that really made the original game so interesting for so many people - its uniqueness. Unlike other Yoshi-centric titles like Yoshi's Story, Yoshi's New Island does absolutely nothing to distinguish itself as a new game. Other than the graphics, pretty much everything about Yoshi's New Island could be done on the Super Nintendo.
Even that new more modern graphical style that Nintendo has adopted takes away from the charm of the Yoshi's Island series, however. Instead of hte beautiful and unique style that typified the Super Nintendo game, New Island uses a mostly generic Mario artstyle.
The gameplay, while it has not been modernized or changed in any significant way hasn't really changed at all. There is nothing interesting going on if you've played the first Yoshi's Island - but perhaps that is New Island's biggest strength. People that have some sort of strong opinion on the original Super Nintendo game will more than likely not be huge fans of the new game - but people who have never touched a Yoshi's Island game in the past could certainly find a lot of fun in the new one.
Of course, that would make the assumption that they haven't really played a large amount of side scrolling platformers either. Like so many other Nintendo platformers, Yoshi's New Island starts off relatively easy. Most Nintendo platformers would then take a sharp turn upwards in difficulty after the first few levels - but not New Island. Instead, the game waits until the last few levels before it finally becomes as difficult as you would expect a Nintendo platformer to be. Indeed, many levels of the Super Nintendo game were notoriously difficult, and in losing that the game loses another part of its charm.
Without it's charm, what does Yoshi's New Island actually have? Not a whole lot. Without the charm that made the original game so interesting, Yoshi's New Island has become yet another bland platformer in a sea of similar titles on the 3DS - many of them from the same company. New Island is a valiant attempt at recapturing the flame of the original title, but it is clear that the people who developed this game did not quite understand what people really loved about the Super Nintendo game.
The original game was not so beloved because it had a fun egg throwing mechanic - that was probably the worst part, and has always been somewhat clunky. The original game was fantastic because it was doing something that Nintendo had always seemed reluctant to do - try new things. In a world where Nintendo is churning out the same games year after year in an attempt to boost sales of their hardware platforms, the degradation of such a unique franchise like Yoshi's Island stands out as even worse as it would have been otherwise. Yoshi's New Island is by no means a bad game, and is probably worth picking up on a sale or a rental, but no one should pay full price.