2H only needs 9% to hit total ever. then you will not miss, but you'll still have dodge to worry about (2% less with any dps spec, so 57 expertise will take care of the rest after you have your 9% to hit (143 rating), yes those are maximum values, yes you want them).
D/w needs 9% to hit, but more doesn't hurt.
With your current gear (EU server?) it looks like you have ~8% to hit.
Yeah, I know, it looks like your still gearing up.
I'd suggest 2h because it requires less hit to be proficient. Sadly, many mobs in kara are immune to bleed effects, which negates blood frenzy from being a useful talent spec.
If you WERE to go back to 2h dps, don't use MS for dps. Use slam, get imp slam.
MS is 2x the rage of slam, for only a little more per hit. If you get a good swing timer addon (I recommend quartz; ace2 mod), and have decent latency, you'll find you can slam effectively for a good amount of dps. And if you white crit, you can even put out a MS or WW every once in a while too.
With your gear, you wont be getting 5+ rage per second on a 2h. So you wont be hitting MS every cooldown. Yes it's a nice ability to keep the mob from healing, but usually you can time it so that you can apply the buff right before a heal or during a HoT, while keeping your rotation of abilities pretty secure.
you'd be losing about 100+ personal DPS by going 2h from d/w.
4% improved physical raid dps on a 10 man isn't really worth it. 1-2 tanks (very low physical dps, very low usefulness for them), ~3 healers (no use to them), potentially 5-6 physical dps (very unlikely, as casters have some great advantages to melee in kara). If your raid is in equal lvl gear, doing about ~400 dps personal, that's ~80-96 raid dps gained.
If they are better geared than you, say 500 dps personal, that's 100-120 dps gained though, but only if your whole group is physical dps.
-BUT THIS IS ONLY ON MOBS THAT TAKE BLEED DEBUFFS-.
With your gear, do not go BT and 2h, 31/30 is still superior to 17/44 for 2h until you have some better gear (say, 3k ap unbuffed.)