Its not that much of a change (22% still leads to ~1.4k heals if you health stack), but I'd guess slightly less pounce spammage, in favor of heal. Slightly. Mainly it'll affect item buy order, as ~1.5k to upgrade your monks 100% was sweet and could take precedence over certain other 1.5k items. Now it'll cost ~2k to upgrade to upgrade your monks 47%, which can wait until later.
It depends on how you look at it. HW's effect on Sedna's priest minions went from doubling their potential effectiveness (15% to 30%) to now only increasing it by 50% (15% to 22%). 22% heal is very nice, but 15% is pretty good, too. I think that makes HW II more of a tempting option than a must-have by level 5 for any Sedna build, which is how it ought to be.