The additional bandwidth is not really that big. Yes, you cannot cache the big news-papers etc. when everything is https, but I think most stuff people do nowadays is things that's not cache-friendly anyway (like your private e-mail, facebook etc.). If they are afraid of some people using all the bandwidth because they cannot block youtube, netflix etc., they can can divide the traffic in better ways, limiting each client.
> Restricting the use of HTTP will require changing a number of scientific analysis tools.
A non-argument. One cannot let things remain the same for ages just because of backwards compatibility.
> HTTPS is not a security improvement for the hosts.
So what?
> HTTPS is frequently implemented improperly
Non-argument. Https not being perfect doesn't mean it's useless.
I'm not necessarily saying https-everywhere is a good idea, just that these arguments adds nothing to the discussion.