At a competitive level, DS is hard to deal with. Not impossible, but very difficult atm (even though I know how to approach the majority of the matchup). At the casual level though, he is probably ruining the game for a lot of players - so I think NRS will probably patch him.
Also, as a Noob player who did place in tourneys, I am positive that DS is better overall than Noob was. Noobs nerfs/buffs did make him near useless in the end though, so longterm, DS may need to stay closer to where he is now than major nerfs. Noob always had bad matchups that could punish the projectiles on block at half screen. I dont know if anyone can do that to DS, but if they could, then more ppl could just pick a better matchup against the character.