When has DA ever had a spammable healing spell though?
For the definition of 'spam' that is 'there are no practical upper bounds on the number of times it can be used in a single combat'. You know: the definition that makes sense given the rest of my post.
The only limitation on the number of Heals and Group Heals you could cast in DA:O, DA:A, and DA2 was mana level, which was a renewable resource.
As long as I don't use Heal more than eight times in any given battle, it won't be any different mechanically than if I camp spammed. I'm not doing anything fundamentally different, mechanically speaking, than what I could be doing, just making it much less tedious.
That's not down to mechanics, that's down to personal use and preference; if there's nothing in the game stopping you from using all those Heals, then there is, to be tautological,
nothing in the game stopping you from using all those Heals.