Please try and calculate (read: approximate) how Haste Rating affects Focus regeneration. This will be extremely important to know for planning gear choices and to figure out Haste "plateaus", so to speak. Eg: At X haste, you regenerate focus fast enough to drop one Steady Shot before another shot.
I'm not sure exactly how you would be able to test this, probably by standing still taking pieces of gear on and off in front of a training dummy that you can waste focus on, or something.
Also, if there are any hunters who are also dataminers... try to find the exact conversion rates. The theorycrafters, min/maxers and the curious will thank you.