As one of the beta testers who got a call with one of the UI designers, I told them, "I only complain so loudly because I love you."
There's no good point in JUST complaining (ranting) though - actionable feedback is one thing, and I think they welcome that. No, I KNOW they do. Changes are NOT set in stone. Why suffer in silence?
But Medium welcoming feedback doesn't mean we'll win every little battle - because maybe, just MAYBE, there are more people who actually LIKE a thing than there are those of us who DISLIKE a thing. That's why everyone should VOTE, right? Voting makes a difference. Bitching, while sulking over in the corner, just loudly enough everyone who can't do a thing about it can hear us? Nah, that never brings desired results. ;)
All the little "Medium sucks and I'mma take my shit and go" posts are pointless. I see those and think, "Yeah, don't let the door hit ya..." Stay, or go. If you stay, make the best of it.