I am sure as many of you know WoH > Glimmer by simply healing far more for far less. Nothing can beat the healing power of WoH. As a result Glimmer just doesn't compete in its current state...It is a very one dimensional skill and needs a mechanical advantage to offer some sort of alternative to WoH.
Here is a thread I started to list possible enhancements/buffs. Post yours here or there too!