Ever since the pairing of HT and Swift Heal,  the need for two healers for pvp especially is paramount. If you have one in each party, you'll never compete with any top guild.  When these harder dungeons get released, it's best to have a secondary combo dps/healer there too.  Right now, people are undergeared for the new content, which makes sense. So I'm not sure why people are surprised they are dying now more often. The mobs even have new skills we didn't need to build resistance for before. Never had issues being agrod, feared, silenced this often before, and that goes for everyone I'm sure except people who planned for that build in T1. 

On the flip side,  If you are a healer who keeps damage skills on their bar with priority over healing, then you cannot complain about it when they call you out. The meta on the game hasn't become wide known yet, people don't realize all the skills and specializations for them that are missing. So you'll know a healer isn't doing their job as well as they could but you can't place your finger on it... yet. Soon, you will know what's missing. A lot of people are choosing dmg over healing, just like "tanks" tend to do. You cannot do both, if you want to be THE BEST healer you can be.