Merciless Resolve:
1) The light attacks fired with the bow proc as well as the initial cast both count toward your stack counter. Effectively making it like your stack counter is resetting to 1 instead of 0.
2) The delay associated with the 5th light attack proccing the bow is significantly longer than on live, meaning it's no longer worth it to wait for.
Relentless Focus:
1) The light attacks fired with the bow proc as well as the initial cast DO NOT count towards your stack counter. This is the same as on live.
2) The delay associated with the 5th light attack proccing the bow is the SAME as on live.
3) Heavy attacks with Inferno staves/Bows/etc count as 3 stacks, Dual Wield counts as 4 stacks (LOL) - Most of these count for 2 stacks on live.
Which changes are intended? I figured these skills would be coded together but I guess not.