Your link is wrong. Should look like something like this. Here is mine
http://talent.mmo-champion.com/?prie...0&version=9684
I agree on your objections to serendipity in theory. 30% spellhaste is not a lot. It's notable, but nothing you can't live without; you heal just fine as it is now. I'll try it out; might be worthwhile to pick at the end of the day anyway, but nothing worth doing silly dances over. Listed talent tree above does not have it.
Blessed resilience is actually decent for PVE now. +3% heals is a very good value for 3 talent points; it's not like anything else in the deep end of the tree is unmissable; might as well go for something that will give you good value. A flat +healing boost is boring, but better than the alternatives.
Body and Soul is a PVP talent. Movement speed increase won't help me in raids, and the poison dispel is not my job. It's also a deep holy pvp talent, making it kinda silly.
New Test of Faith is crap. Hardly notable extra healing on people low on health. The old version was quite notable, but not surefire. But when it triggered a crit, you could always say "Thank you, Test of faith!". It really made a difference when hurling a CoH at a low health raid.
I always end up dropping Empowered Healing. It's expensive, and only affect my single target heals. Which are way strong enough already, thank you very much. It's e-peen to show off a 16k crit, but is it remotely useful?
Holy Reach is a talent i like personally, but it's not giving me much tbh. Just like being able to stay further back than everyone else. If I need more talent points, this is the first to go.
Mental Agility is a talent I think every holypriest shoud get after 3.1. Mana will be our only showstopper, and this talent will help a lot!