Great thread so far, unfortunately I don't have anything useful to contribute. However, I'm still going to post for two reasons. First off, to try and show there are indeed more than 5 Ice tankers (I'm sure there are mabye 20 or so if you count unplayed alts!)
Second, I'm going to have to say I really like the way for the most part this hasn't been a "We're not the exact same as other builds, that's not fair!" thread. In particular, I think there are some great ideas out there for making Ice Better/stand out on its own (for example, what if Ice became the low end king/Scranker Dream set, or adding health bonuses to our most useless power Permafrost.)
I think the solution here would be a bunch of minor tweaks that add up to something nice for Ice tanks. For example ok we can go with the new EA def buff, but now include psi in its def, also keep (for PvM) the end drain/taunt. Allow the -recharge of CE to be affected by slow Enhs, give permafrost a perm HP boost, and reduce the end use of all of our powers. Suddenly Ice/ is far less gimped, still in no way Uber, and most importantly is still a unique set. That's the core reason I think most of us took ice; for a unique set.
