A temporary "reference node" isn't anymore centralized than a dev who releases a wallet that everyone downloads and starts to use. Only after a coin is at the stage where it doesn't depend on one developer it begins to be decentralized.
The problem with the, "Temporary" reference node is it has been in place for how many months now? And it'll be in place for at least how many more months while Evan rewrites the masternode code? At this point, it has been upgraded to, "Semi-permanent". As I've said, I do believe that it will be removed successfully at some point but until then, I am not a buyer and I had to be a seller because the fundamentals changed.
I agree with you about the multiple developers. In my opinion, that is one of the biggest risks for Spreadcoin. But with that said, I'm unconvinced any of the current Darkcoin developers could replace Evan in his role. They're all great developers and people like Vertoe and UdjinM6 have been stellar, but I'm unsure they could do what Evan is doing. Hopefully we never find out.