And I Re-Iterate:
Wait for SE to release 4.0. All the healers are in a good standing. No one is unable to heal anything right now. I still disagree to the statement that the majority of players are rejecting WHM because you feel you do less than a SCH and an AST. A healers job is to keep everyone alive, anything else is an additive feature. WHM's you do a spectacular job in add clearing more so than a AST can. And more immediate than a Scholar. This is both Raid and Dungeon. WHM's you also require the least amount of spell casting to top up everyone's HP. That's one of the reasons why your mana cost is higher than anyone else's. You also do a great job at inflicting immediate damage as you scale very well with spell speed better than the other two classes. Sch's will always outshine you when it comes to taking care of Tanks and managing Tank busters. At the same time, no one will heal better than your class when it comes to party wide damage. Your dps is actually better than an AST. And the MP cost on said DPS skills are practically the same. And for those of you who don't care for spellspeed or have an extra materia slot, WHM your class scales excellently with Piety Melds. Even a fully Piety meld WHM have cleared end game raids without back breaking work. SCH will always be the best class for mana refreshment. And Using Celestial opposition on AST during Luminiferous Aether is situational. Sometimes I just use it for light speed. Most of the times i use it to extend cards. (Including boosted or extended ones on single targets with time dilation) Just because our class can extend our MP regen duration doesn't mean it's there to use all the time. Because sometimes i have to use that spell offensively to control mobs if our tank is in trouble.
I see soo many positives of the class but you guys just wan't more skills to fill up your hot bars. Instead, use what you can do right now to remind not just others but yourselves that: "Hey, It's just an added bonus, but I still clear adds better and faster than the other healers, I do hold something over them that they don't have."
TLDR: Wait for 4.0. Have fun with what you have right now.