Holy Paladin - after starting to play a holy paladin from the beginning and testing all spell and talents in more than 1k bgs / 5k arenas and hundreds of dungeons this is what is working and what is not.
This is not a guide or a cry wall - its just a post for ppl. who want to play this spec and they don't know what is working or not. For sure i made some mistakes here if you notice tham feel free to post and be constructive. If you wish to respond to something by disagreeing with it. That’s fine. But, remember to criticize the ideas, not me. thanks. Spells:
http://www.wowhead.com/spell=213428/artificial-damage most important - silver hand trait 1% damage for every trait purchase up to 34 traits is not working.
http://www.wowhead.com/spell=20271/judgment the base spell of holy spec , only damage part working, don't give bonus to 30% increased damage from your Crusader Strike and Holy Shock for 6 sec or  After Judgment strikes an enemy, all damage you take for the next 4 sec is reduced by 10%.
http://www.wowhead.com/spell=53563/beacon-of-light dont give mana back
http://www.wowhead.com/spell=4987/cleanse  dont clean all, just 1 or 2 or nothing.
http://www.wowhead.com/spell=85222/light-of-dawn spell power coefficients for this spell are wrong calculated at 30k spell power + artefact traits 15%  heal for 44k -  (if you don't know your spell power use DejaCharacterStats703r17 addon )
http://www.wowhead.com/spell=31821/aura-mastery not working no matter what aura you have active. Holy Paladin Talents
http://www.wowhead.com/spell=196926/crusaders-might  not working. (good talent for burst and for short windows of damage very important in conjunction with other offensive talents)
http://www.wowhead.com/spell=115750/blinding-ligh working partial (only blind part working) - the part with DON'T break on holy damage is not working so you can't hit with holy damage the target that is in cc)
all auras and their aura mastery - they don't work
http://www.wowhead.com/spell=20066/repentance damage part not working
http://www.wowhead.com/spell=196923/fervent-martyr  not working
http://www.wowhead.com/spell=156910/beacon-of-faith not working

Holy Paladin PVP Talents


the most important talents here are not working.
http://www.wowhead.com/spell=210294/divine-favor not working (i get silence with this buff up on me - only visual)
http://www.wowhead.com/spell=216327/lights-grace not working ( proc from every healing, dont give 100% bonus to holy light ( give 50% only) also the buff 15% damage reduction is only visual
http://www.wowhead.com/spell=210378/darkest-before-the-dawn - not working (this talent is the new loh for pvp
http://www.wowhead.com/spell=216331/avenging-crusader  - not working.
  Holy Paladin Weapon
half of the weapon talents are not working or proc give bonus randomly http://www.wowhead.com/spell=200302/knight-of-the-silver-hand no damage reduction
http://www.wowhead.com/spell=200373/vindicator sometimes working and some arena dont proc ever
http://www.wowhead.com/spell=200474/power-of-the-silver-hand proc from all spells but doing nothing/ only visual
  Future updates will be done here, thank you for reading.