The truth is, getting to hit cap is imperative to good damage, but if you have a .09% chance to miss, you're probably okay for a while. I ran with (accidentally) 14.5% hit one night for a three hour raid, and didn't miss a single time. I've also ran at 14.99 and missed my combustion, which was incredibly annoying. It all comes down to that chance that you actually do miss an ability. Your hit cap will not drastically change your dps. As far as other stats, Mastery is actually more beneficial if you are between haste breakpoints. That will certainly involve some math, but keep it in mind. You don't really have enough crit to out damage frost, but if you can't get almost equal haste then it's up to you.
Also, OP, if you're going to ask for advice, don't react like you did. If you don't like what someone says, just thank them and move on. No point in arguing over advice you don't agree with.