Been doing some work this morning and can see my scale factors have shifted, without any significant gear upgrades.
Initially haste was always showing up as the marginal winner over Mastery, however when Sparkz outlined the 10%Haste soft cap, I worked some numbers around that aswell.
Below is my armoury link and scale factors currently (I run tens of thousands of sims to get this results). This time last week, with the same gear, Mastery was coming out slightly ahead with the 10% Haste unbuffed, but not anymore.
I realise we are talking about .03 in the difference, and you will quickly ascertain I'm not raiding this tier, but I've been crunching numbers for nearly 7 years now, and a change in weight with no change in gear, surprises me.