They made it harder to optimize, but I do not think most normal mode and dungeon healers care about what is optimal. People also did not like dot management either.
They did make it more accessible by the nature of making it so healers do not have to play optimally to clear the content. I mean come on we already have people crying about the current difficulty of the current normal mode raid. They can throw out a dps spell every so often and generally get a clear in both normal and dungeon content.
Which is where I think personally they balance the classes around that level of play, but then add harder content like ult to challenge players. It is a balance idk maybe in their heads they feel if they add a little more depth to jobs they will have to tone down encounters to keep a certain balance idk.
Maybe I am crazy but isn't the healer strike about normal play? I am pretty sure we all understand that the balance from the bottom up not top down. They have shown this is the direction they wish to go with many job changes. So that means depth and difficulty comes from the encounters, but the moment they even slightly add some difficulty people whine and cry about it. The devs are in a weird spot and I do not envy them.
End of the day the avg player is bad, we need to accept that what may seem simple for us may not be the case for others.