Theres a valid piece of feedback just in this thread which wasn't mentioned in the other one. You can't expect every single person that posts to provide constructive feedback, but if you lock the thread, you lose the few gems that matter.
Also, surely, the amount of people disliking or liking a certain change should be considered? A simple Poll would be a more democratic way to silence the people like me, who think the opposing view is in overwhelming favour.