I think Templar will be ironed out. As it is, I've seen many videos of Templars healing ranked dungeons with no issues. What I got from the devs answer was that they are making changes, but don't want to talk about them yet until they are sure they are going to work. Here's the question and answer:
Alright, so I know this is a tricky one, because the old restoring spirit passive was extremely flexible and powerful. I am very sensitive to the fact that the changes we make can sometimes have an effect on the builds that you spent a long time developing. I promise you we each take balance changes very seriously.
The reason for the change to the restoring spirit had more to do with how it scaled as players progressed through Veteran ranks (especially beyond rank 10) than with how it was performing in the level 1 – 50 experience. We considered a few options for altering that value, but ultimately, we decided on a % reduction to all costs gives the class a lot of flexibility and scales very well in the long term.
I guess that doesn’t answer your specific question: can I speak to the plans for Templar’s Magicka recovery after that change? Short answer is, it’s something I am actively looking at, but i don’t want to speak to specific changes just yet until we are fully confident in the design and implementation. I hate not be able to give you details just yet, but I wanted to at least let all the Templar’s know that I am aware of the feedback and looking into it.