Right now, the rank upgrades refer to the Temple's healing ability as 'Mend'. This is the same name as our pets' skill 'Mend'. When I upgraded my Temple to the next rank, I was expecting the cooldown of my pets' skill to lower, not the cooldown of the Temple. So I was both confused and a little disappointed when it didn't. Thankfully 18eities explained to me what I had misunderstood.

I would like to suggest that the Temple's ability be called something other than 'Mend'. This would help to avoid similar experiences in the future.