I have to agree with point #1. I hated the small compose window until I realized I can minimize it, browse/search my Gmail and then return to finish.
I can't say I agree with your other points. Sometimes, you need to write a long email and there's no way around it. an email provider should not be trying to re-invent how people use email, they should embrace how people use email and make it better.
I can't say I agree with your other points. Sometimes, you need to write a long email and there's no way around it. an email provider should not be trying to re-invent how people use email, they should embrace how people use email and make it better.