Hm, I must admit, great marketing ZOS.
Warden was designed and presented to be a supportive class, but we already had a supportive class - templar.
Because of the strong templar reputation, nerfs had to be enormous, to ensure everybody will talk about them. It doesn't matter if templar healer is worse or better now than sorcs, dks or nbs. What only matters now is, if warden (class locked behind a paywall) is the best and it's reputation is growing.
I don't really care about the templar nerfs. I'll just let my templar sit in the character list until they make changes to make it the best healer again. And they surely will, templars were always intended as primary healers so these nerfs are just temporary. Once enough Morrowind copies are sold, they'll get back to balancing and templar healers will shine once more. Nobody can convince me of these changes not being a part of Morrowind marketing campaign.
Don't worry guys, templar nerfs aren't result of balancing, just a temporary marketing tool to increase sales.