It would really depend on how you define success.
It currently holds the number two spot in the North American/European MMO market which is nothing to sneeze at.
From the return on investment lens of EA, it has to be an abject failure because it came no where near the boxes sold or subscriber retention goals they had.
The real failure of the game comes from the fact that the game designers did not keep a unified vision for what they wanted the game to be. The game has great parts, but the overall experience is less than the sum of those parts.