The BitShares creators are planning to upgrade bitshares in the near future, which means that the old system will be discontinued. Therefore, is bitshares really decentralised if someone at the top can pull the plug on it at any time?
If the community doesnt want a change to happen, they can block it from happening. Also, in the future all changes are going to be voted on.
Bitshares 2.0 upgrade however, is something the community desperately wants right now, because the current client is bad and many of us have regular problems trying to use it.
It is true that right now, in the early stages, bitshares development makes it "too centralized". This is a thing that will change and needs to change once the project gets farther along.
Pretty much as soon as 2.0 drops, I think you will see a lot of people pushing to decentralize BTS as much as possible.
Its really important to understand that the new version does NOT mean your old BTS is worthless. On the contrary, all old BTS converts to new BTS at 1:1 ratio, and will probably rise in price once the better version comes out and is more user friendly.