Now, I won't call myself an amazing monk healer. Not yet. I've only been playing the class for a week. But as I struggled to keep up with the pace this pro internet warrior, I spent most of my time OOM or dead (because I was OOM), and the rest of the group spent a lot of time popping cooldowns and trying not to die. Mr Pro Tank raged at me a bunch, called me useless, and ragequit the group after he pulled an entire hallway of about two dozen mobs while I was about 20% mana at the start of the fight, and died.
Tanks, let me fill you in on a few things. Just between us girls.
 I'm a monk. I didn't exist prior to a week ago. I'm learning how to play a new class that happens to be a pretty fun, but also a fairly complex healer. The only way I'm going to learn to become a good monk healer is to heal people like you in leveling instances, over and over. I'm going to fail sometimes, because I'm still learning how it all works.
Do you really want me to arrive at 90 with no clue how to do my job? You'd really be mad then, I bet. Better I practice now, when it doesn't count, then later when you're really depending on me in a raid or heroic or challenge mode.
 I'm wearing GREENS and QUEST BLUES, and many of those pieces don't have my most crucial stat on them, which is Spirit. Why don't they have Spirit? Because it's leveling quest reward gear that I have to share with DPS classes who don't need Spirit, and there are way more DPSers than healers, as a rule, especially when leveling.
My mana regen sucks donkey balls right now, dudes. It's true. I run out of mana on long fights or on bursty fights as a rule, trash and bosses both. I struggle to keep up with incoming damage while also managing three resource systems: MANA, CHI, and MANA TEA. That's three resource pools to your simple one pool of Rage or Runes (Yes, paladins, you have two. But it's not hard, is it?)
So cut your monk healer some slack, dudes. He's new, his gear is crap and as a result you can't pull Panda dungeons the way you did Cata heroics back when you were all overgeared and pulling everything in sight at the same time. The game LOOKS the same, but it's DIFFERENT. Capice?
At 90, in purples, it's going to be a different ballgame. I get the feeling that once my Spirit hits a certain threshold, and once I master the nuances of the class, I'm going to rock your socks. Until then---go easy on your Mistweavers.