To be fair, the Battle Tower was also removed, and many people (not myself) enjoyed the two regions.What features were removed? The day night thing? because that was a novelty that sucks for anyone who can only play at specific times of the day and doesn't want to mess with the clock. A bunch of pokemon? All of them were still in the game and were able to be obtained through later gens. And I think even for more casual players, stuff like making the boxes not suck ass is a pretty big improvement.
Oh, and they added annoying animations for HMs.