I understand that on paper long ET is a good power, but in practice, it is a terrible power and will hit a defeated mob about 1/2 the time. If ET needs a longer cooldown, I would be great with it. If it needs less damage, or more self damage, great. The long animation is a no go for me. If this is how we get it on live, I will probably play my tank a bit more often, but it will be either lower end content to avoid the ET problem, or I will avoid using powercrash which is what was happening in my test sessions.
I will do some more testing to try and figure out how to make lemonade, but as of now, I think EM still needs tweaking.