Those day, when I play BG, I like it very much because it is more like an old school RPG despite the limitation of number of times you can cast a spell. Positioning is not the focus those days. It's more of a number game. You have a 'dice'. Hits are based on chances.
Then WoW came out. I liked the game coz the mechanic is working very well. Once you beat the boss, they launch a new content. New challenge. But after 10 years with them, I eventually got bored. I played a priest and I enjoyed healing very much. It's very challenging trying to manage CD and mana while topping up the tank and party members.
DA:O came out too. I like that game very much too coz it's also very RPG alike. You have hit chance, you can backstab, you can heal, there are puzzle to solve, you kill a boss it drops a cool gear, good story line, etc.
The fact that they take out healing will alienate many fans. I think it's not about whether 'how' healing should work, e.g. having a healing spell or drinking a potion. It's about not having that OPTION. If they impose healing, they can still put some sort of restrictions but at the same time satisfy those who wanted healing. The best way is usually having a balanced mana regeneration, e.g. for every healing spell you cast it slows down your mana regeneration and healing potion consumption have CD just like the old WoW days. Something like that. There are always WAYS TO BALANCE the gameplay NOT by the means of taking that option completely away.
At the end of the day, HAVING THE OPTION is always welcome coz the fans get to play the game the way they want to play it. Example, for those who want to have fun, they can choose a more OP path but for those who want to challenging experience, they can choose a more restricted path.
It's not about the difficulty setting. Practically that applies to the AI or enemy capability, etc. But it's about the customization to suits DIFFERENT GAMEPLAY STYLE BY INDIVIDUALS to achieve their own preferred experience.
But the rule of thumb is to KEEP and ENHANCE what's WORKING and re-invent WHAT'S NOT.
When I play Bayonetta 2, it's fantastic. It's as good as the original. They KEPT what's working and further ENHANCE it! WITCH TIME!