I find it confusing that things are banned due to becoming 'over-centralizing' yet the entire Singles metagame revolves around these moves. Rocks completely dictate which Pokes are usable and which aren't. It becomes a priority to the point where nearly every team has a dedicated Rocks/Spikes user, Spinner, and or Spin-Blocker. It's been regarded by lots as one, if not the, most important move in the metagame.
....I think it's a bit over-centralizing.
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The more I play doubles, the more I realize that things are balanced with doubles in mind, not singles (doubles being the official format, of course). All the things people whine about in singles (stealth rock, weather, even evasion) aren't too hard to counter in doubles. Not saying doubles is perfect, but it's a hell of a lot more strategic and balanced than singles.
So stealth rock is fine the way it is because it's perfectly balanced in official tournaments. If Smogon or whoever wants to ban it from singles, let them, but don't change it because it's a problem only in 6v6 singles.