Hmmmmm...

Haskell was developed by teams, but we had BEFORE: hope, miranda, ML ... The heritage is quite important.
And individuals (say, Mark Jones) contributed to Haskell constructs. So, the design is not entirely "committe based"

      1. Promise to me, and the rest of the community, that Haskell will always spiritually remain the same clean, consistent programming language as it is now!

Yes.
Dear Mom, dear Dad! Promise me that you will never die...

I wish that for all of you.
Jerzy Karczmarczuk