[nekopa]

To respond to your first 4 questions:

Q1: Yes and No. From what I've seen (anecdata) an group of people working together ten to generate better ideas than one person could. The No comes from the fact that oftentimes one person came up an idea that they wouldn't have found without the other people.

Q2: Much better. Normally through 2 ways: first, defense of an idea make you have to improve it so that it gets accepted. second if the idea is collaborated upon the multiple feedbacks on forming the idea improves it.

Q3: My first knee jerk reaction to this question was that you need to limit the amount of people involved because communication is key: say 6-9 people. But on further thought, if your communications channels are set up well (forums, slack, IRC etc.), then you can go to the wisdom of the crowds, so maybe scale would work.

Q4: If the R&D lab is set up right, yes, you could get fundamentally better ideas, for various reasons: - facilities, collab, standing on the shoulders of giants (by this I mean building on what others have already built) etc.