You really can't call that strategy "cheesing," Nestar. My 10M group found Grand Empress is actually easier to go into the second phase 1 with a Reaver alive. Given your tanks know what the fuck they're doing and your healers aren't especially taxed, it gives your melee a decent buff which we found helped us push the last phase before the second wave of sonic discharge comes out.
Additionally, when the fuck HASN'T WoL been all about people abusing mechanics to get higher parses? It was like this for ALL of Cataclysm, so it baffles me why it'd suddenly change in this expac. That's why RaidBots isn't always the best tool to measure how players are stacking up against each other. It's also far too subjective and the sample size is too small to say ridiculous bullshit like "oh, your whole raid's DPS sucks because you're top." Some Priests in some guilds are going to do better than the same exact Priests in other guilds. Some guilds run private logs (and some don't run logs at all), so we can't even say that we're looking at the whole picture when you glance at WoL rankings. Some encounters favor SPriests, others don't. Taking this into consideration, the opinion of an SPriest that is doing relatively well in their guild might be different than one who is struggling. The idea that we're vastly underpowered when stacked against other players of different classes and similar skill level based off of your own raiding experience is anecdotal evidence of a problem that isn't nearly as bad as some people make it out to be. This particular "problem" has existed since DPS meters were introduced. It's just too difficult for Blizzard to balance 45,000 DPS specs evenly and, again, it's very unlikely we'll ever see this game balanced as such.
I'll digress slightly and concede that, yes, the rotation is a bit stale and yes, there isn't much that rewards a truly amazing SPriest when compared to a mediocre SPriest, but that's where the minutiae comes into play (ie, spec changing and experimenting on your own to see what nets you the most personal DPS on any given encounter). Sure, we might not be Affliction Warlocks or whatever Mage spec is currently dominating meters, but we're also not MM Hunters or Sub Rogues. SPriests are not being unilaterally sat by top end guilds because of poor relative performance, either. Number tweaking is a possible solution to the single target woes a lot of SPriests are experiencing, but it seems unrealistic to expect them to completely redesign the way things are working presently by the time 5.2 hits.