I'm sorry that I don't have a good answer for this. Changing toolsets is something that we can't do lightly. On Windows if we did ditch ICC we would also need to move to a more modern compiler, which raises other issues. Though I suppose most users on Windows are using 64-bit at this point, which might require less changes.
If I had to give a simple answer, it would be: maybe not, but it's too big of an undertaking to change at the moment.