SotR's 3s Silence wont go live, i can promise that.
Let me say "Dimishing Returns". In fight against ~ say~ a warlock, it the silence effect will stop working after the 3rd use, which would be 18 seconds. With our incredible Prot-Burst damage almost 20 seconds are not enough to kill someone in PvP gear.
A spell interrupt would be amazing, this is a nice one for PvE, Caster-trashgroups and stuff.
As i said, it wont go live like that.