This is the guy I want to play with. All specs are viable and mostly it is a user issue. Good to see I am not the only one who doesn't blame everyone and everything else for their problems.
again, to use real examples here of where the problem is:
tortos - shaman is very valuable (right now until 5.3 goes live) to handle 2 stomps at least decently with HTT on 1 and ascendance/SWG/HST on another. Inbetween those 2 stomps our toolkit consists of RT, ES, HST (when not on cd) and possibly healing rain/healing surge if you can avoid getting punted. I wouldn't count on the latter landing consistently though, and if a tank or another raid member is about to die and RT is on CD you basically sit there frustrated and hope someone else can do your job. Because SWG is so strong with Ascendance... I've found that it's just not worth using on CD for sporadic raid damage given that ascendance is very unreliable if i get interrupted at all by turtles.
Ji'Kun - on 25m especially it is exceptionally annoying to anything but tank heal due to range restrictions. I can't speak for healing platforms as I've never done it... but on the main platform we literally had to make our 25m raid learn to collapse/stack for quills because of my inability to heal the raid damage otherwise. This creates a lot of extra problems with Caw as people are either coming in to stack or leaving... as well as extra puddles. Inbetween I am left with HST (if its available) and rt/hs to handle any raid damage because my aoe is completely unreliable.
Durumu - I have to be on the blue add. Thankfully we have other healers that have more instant casts and can handle other areas. The maze consists of dropping healing rain, RT on someone low and totems. I usually try to drop healing rain (almost getting singed) and sprint ahead to the next healing rain drop (using totems/rt inbetween) and repeat. It could be worse but it could be a lot better too... and if someone gets caught at all and totems are on CD? lol yeah brez.
Primordius - just a gigantic headache anytime the spread mechanic is present. Without the spread mechanic I can hopefully place my healing rain well enough that it gets use when necessary but not always. When people have to spread, I have to either use single target spells or pray that chain heal actually jumps and doesn't just stop somewhere. I also have to rely on the tank kiting at the right speed to make use of my healing rain (hopefully).
Dark Animus - again I'm usually forced to single target snipe because the raid is spread to such a degree that both chain heal and healing rain are unreliable. In 10m using HS/HW/GHW might not seem so detrimental but to a 25m raider it is just not adequate. Most of my time is spent healing tanks, sniping heals on debuffed players and mashing my healing stream button hoping it will come off CD faster.
Iron Qon - phase 1 is actually pretty nice. Then the fight is terrible until the last phase. HTT is pretty strong for tornados (with swg/ascendance on the 2nd tornado) but once the raid has to spread and deal with the debuff.... i usually run to the far side of the room to not be in the way because my healing is useless anyway. Thankfully I make it up on the last phase where healing rain and chain heal are both useful.
Twin Consorts - I can't use my main throughput ability (healing rain) for half the fight because of the tank debuff. Also at times deal with all of the range problems above. Thankfully the fight is overall pretty easy to heal and it goes alright.
Lei Shen - I have very little burst capability to pick up the (meaningless really) healing early on. I can handle being low on the meters because of this as nobody really dies. Transitions I'd value my contributions in the middle... I can't bubble people to reduce static shock damage... but at least I can move decently to ball lightning and bring a (weak) raid wall for static shock. The last phase consists of swapping between casting healing rain / hst / rt and fighting wind in ghost wolf form to setup the next healing rain cast. When the wind stops i can usually help top people off. Overall Lei Shen isn't terrible but I'd have a lot more options as any other spec.
Again, I'm not asking for a 20% buff to healing rain. I'm asking for help in situations with high movement and/or spread. Combine the 2 (high movement and spread) and our only options are totems (CDs) and RT (6s CD). The glyph of RT is so terrible that its almost always better to just use regular RT its worth about 2 glyphed RTs anyway :p
Spread encounters are atrocious for 25m. Chain heal stops frequently because of players moving out of range or getting healed to full before you cast (breaking the chain). Yes there are more people in melee but often the mechanics don't target melee... and even if they do, its tough to only heal 1/3 the raid because of positional requirements.
This is what I would like to see fixed/improved.