There are actually *FOUR* draft agreements posted by Harmony. Two are just "contributor agreements" that seem to just assert that you're legally allowed to contribute but do NOT assign copyright. Two others DO assign copyright.
I agree that copyright assignment is dangerous, but some projects want them; I'd rather there be a standard form, if there must be one. And contributor agreements without copyright assignment are something a *LOT* of organizations want, and for those I *definitely* want some consensus.