Healing was never the problem. Potions spam was the problem and it was largely resolved by putting a cool down on it in DA2. All the low/no healing combat of DAI did was make the vast majority of fights a bore as the enemies rarely had enough DPS to burst your guys down, and you could just fast travel to camp any time for a top up. As a result, nine out of ten fights were meaningless, and it was only when you ran low on potions (such as during main quests) and couldn't backtrack that the fights became interesting.
Some people might argue that healing makes mages essential, but let's face it, a Barrier bot is every bit as mandatory as a healer ever was previously, but it's mechanics are even less interesting than healing.
Honestly I'd much rather go back to something more reminiscent of the old style, where you start every fight with full health, but the enemies can actually burst you down fast if you screw up and you have limited healing potions and spells (due to cool downs) to keep you up until you can finish them. That way, more encounters would actually be tense and exciting challenges, rather than a series of tedious chores followed by a tense struggle.
1000x this.
I suspect they took it out because the combo of barrier/guard and heal spells was too much work to balance. But they could have given enemies burst damage and counter abilities like to dispel your barrier, block your healing, or strip your guard. If they had done that, combat would have been a lot more fun. And when I say burst damage, I dont mean a bear with its wtfaoeroflstomp -- rather, I am imagining something quick but over-time that can spike quickly if you arent paying attention. Such as multiple debuffs starting to stack.
I find it strange that people can rationalize that removing healing somehow made the game more strategic.
I'd like to see all the spells from Origins return, along with enemy abilities to counter or nullify them. What we got was PotionManager2000 and HP sponge mobs with silly AoE.
Don't get me wrong, I loved DAI, and the combat had its moments, especially the dragon fights. But, as a whole, the combat system
has serious issues which take a lot of the fun out of it.