That T2 we're going to be using until AQ is different, not that different but still different:
http://web.archive.org/web/200512121631 ... ?setid=215
T2 shoulders is offensively in every way worse than T1 (not taking into account set bonuses).
Full T2 8/8's proc chance is actually really low (like 1 or 2 percent) so in the only where i would see it outperforming T1 8/8 is in a long fight with multiple hunters having T2 8/8.