I'm not sure the Kraken club argument works for two reasons:
1. Krakens clubs arn't exactly raining from the sky. While it's true dedicated (insert applicable job here) would get them, they still sell for 90M+ and I think it's a bit silly to balance an event around the assumption everyone has a weapon only a few people do.
2. You can already use Kraken club and/or shield mastery to get a ton of WS procs out fast anyway, and that's also pretty much tied to your melee speed, so how would it be any different on magic procs?