No, I haven't been involved with NeuCoin. Yes, Decred currently has multiple developers that contribute to its codebase and the project itself hopes to grow into a "hacker" collective of sorts in the future. A collective like that would mean anyone interested in development can step forward and be part of that ecosystem. Nobody will be excluded from the development process if they are competent - it is multi-stakeholder. Decred's primary goal is to create that ecosystem and everyone will be working hard to try and make that happen once the code is public and open-source.