there needs to be a comment box that asks why we are cancelling our subscriptions so the ESO team can compile them and fix the issues. every good game needs to know why people cancel and adjust accordingly if they see a huge spike in one area.
i don't hate ESO and i would like to come back one day.
for example i am cancelling because there is no sPvP battle grounds. i would love to come back once ESO makes some. if this is something a bunch of people cancel for (i know 7 of the people in my guild are all cancelling because of this) and if ESO was thinking about it already, maybe seeing this in a graph of "why people cancel" would put it on the front burner for the team before they lose hundreds more.
if they can see that hundreds of people are cancelling because of crappy customer service and not being able to play the game since launch, they can look at it and maybe hire more people to do customer service or make it a top priority to fix the login code problem. (all that needs to be done is changing email)