I can only speak for magplar healers. In the last year, the synergy for shards has been improved to allow some magicka and/or stam support instead of just stam support. Now, what has been degraded? Well, unfortunately that requires a list:

Nerf to Jesus Beam damage.
Loss of stun from Blazing Spear.
Replacing Major Mending with Minor Mending when standing in your aura.
Repentance now only restores stam to the Templar who cast it.

I may have missed an item or two but, in short, the past year has not been kind to magplars.