I have nothing particularly constructive to add other than to say that, like many people, this change completely ruined my weekend at a point when I already had no time to begin with. To say I’m frustrated at this would be a grotesque understatement.
You can’t honestly expect people to buy into the intricate defence of the reasoning behind it above. People are using this service because it’s convenient – the minute it stops becoming convenient (and downloading a plugin or faffing about with CSS when you have an incredibly busy schedule is anything but “convenient”) they move on. I no more care about your reasoning than I care about the personal life of a chef in a restaurant who serves me a bad meal – if it stinks, it stinks and it really doesn’t matter why. You don’t stop to ask why something is useless as a consumer you simply give up on it because it no longer gives you what you want.