Nice thread! I'd play decent amount of healers but didn't keep up was the recent talent changes. I thought d-priest talent was to allow penance to heal allies, did they change during the recent patch? My current default is twist of fate and based on description it does seem pretty strong.
Shaman:
You captured the point perfectly! I really can't say much than that. When it crits the heal boost is really significant. Sometime it feels sad that due to the lack of healers efficiency really depends on spammable a healer is. This gives hot and long casting healer (druid and monk) a hard time. Their spam heal cant really keep people alive for long and that makes thing so much trickier. I switched from Cenarion Circle to Double swiftmend. so that I can have more leisure using an instant life saver. I can't' say exactly how helpful it objectively is, but it buys time.
Monk:
I've been using zen pulse on my mw hoping to give our frontliner a blast heal, but like swiftmend, I don't really know how useful it is. The fact that its range is so short means you are unlikely the boost above 2000. Since the player you are healing is already targeted, they are still likely to die. However, zen pulse has an unique anti-stealth utility. The spell is castable only when there is hostile target nearby, you can keep spamming it when you are guarding a flag, its a really useful tool to blast out rogues and druids since there is no CD if you don't hit anything. For the other two, I've never used Chi wave since it seems to heal very little. The number Qi Burst shows feels satisfying, but I haven't used it enough to judge its usefulness.
Paladin: lol I'm for one that uses holy hammer for its AOE heal and damage. When used optimally, the total heal should be pretty high. Honestly I don't think the three talents are super helpful. I know a lot of people use bestow of light, but it doesn't seem to be really helpful compared to your spam heals.
I do want to start a discussion about how you use the beacon of light though. Who do you usually cast it on? Yourself, nearby healer, FC, or whoever taking damage. I feel like I'm not using it effectively since when you concerntrate