You're browsing the GameFAQs Message Boards as a guest. Sign Up for free (or Log In if you already have an account) to be able to post messages, change how messages are displayed, and view media in posts.
The problem with the Aether is that it didn't try to complement Minecraft's gameplay, it tried to supercede it. All overworld tools being useless in the Aether, and vice versa, meant that there was very little resource trading between the two worlds. It created its own world, but nothing was good for the overworld, so the mod got tons of backlash in the end.