The 5.4.2 patch is hitting on Tuesday December 10th, but there is nothing much in the way of healer changes. You will now be able to send account bound items – such as Timeless Isle gear – to alts on different servers, which should help those who may have their mains on one server, but a collection of alts spread out on different servers. This also allows BOA gear to be sent cross-realm, so if you have BOA gear spread out across realms, you can easily use it to level now.
This won’t be the last patch prior to Warlords of Draenor, so we can expect to see more changes in an upcoming patch closer to the release date.