If you look at the default resto stat weights in the lower-right and click on the 'stat weight editor' tab, you will see that we have a soft cap at 13% haste (we go 0.5% over 12.5% to make sure it doesn't come up short).
So yes, we are considering haste break points -- if you would like to gear for a different break point than 12.5%, you can change that number to whichever point you're aiming for.