I'm guessing if you even play a priest at all you haven't played one for that long. Priests players have always & will always be pesimistic about bugs getting changed because Blizzard has a great record of acknowleging priest problems and not doing anything about them & if anything is does its done shortly before the start of an xpact. Look at priest AOE that was not "fixed" until we got holy nova standardized (gg shadow priests doing AOE with a holy spell) and then when shadow AOE was implimented (Mind Sear) it became the most overpowered AOE in the game (I remember hitting 37k dps on AOE pulls in Naxx) until they decided to give rogues FoK. It took them until Cata to give shadow priests something to do when they get counterspelled & locked out of their shadow school other than dropping shadowform and doing holy dps but even then they broke it before we even got it. They looked at how shadow had no burst dmg for when something needs to be blown up (adds etc) and gave us Mind Spike which makes us go oom fast if we have to deal with too many adds that have to be blown up. They said how we had no dispell protection so they first made VT deal dmg if dispelled then changed it (guessing because they thought it was too powerful to do less dmg than Unstable Affliction's dmg when dispelled minus the silence) being a horrow effect but instead of it being a horror effect its a fear that shares the DR with our other CC/survivability tools and has since the horror was added to the talent in.
Yeah priests have every right to doubt that our bugs will be taken care of unless they are directly stated they are being handled specifically.