[How do we raid when 1/6 Kolto Injections fail to cast?]

It is an issue. Some people notice it others don't. Those that don't blame those that do and get pissy about things like their ping.

[Is the pvp healing...]

Healers don't really get screwed on medals, the kills? all you need is to participate in their death, so using any CC or even a quick AoE like frag grenade will get you all kinds of credit. Also 75k damage even as healing spec is easy between heals.

 

Also with 300+ expertise it is very hard to get soloed while healing. While I would admit sorc/merc are better than Ops at this because of their single target skills whilst Ops have more Healing to go around. Besides what other healing spec only spend 24 points in healing then can go have DPS goodies?