Personally, I don't like the health potion system and shield system. DA:O combat was more my style; you avoided things with positioning and then healed what you couldn't avoid. This game I feel obligated to spam a shield on cooldown just "incase" something gets through the tank's shield as I don't feel like using a LIMITED health potion.
I'm playing on nightmare and the limited potion hasn't been an issue. Use the tactical mode and commands to control your party. It helps alot.
In DA:O I could just try and avoid things and then heal if I needed to. After the fight I could mana/heal up very quickly. In this game I feel like I'm punished for taking any damage since the only way I've come across so far to restore health is potions.
Uh use Solas or Vivienne or Dorian or any mage heal spell but at level six you may not have it yet. At level 6 you shouldn't be using that many potions. If your in a lvl 12 area then your in the wrong spot. I didn't leave the Hinterlands until 8 or so. I did venture into Storm Coast for a bit. It sounds like your trying to force your way into areas you probably shouldn't be in just yet.
I don't think people are "bitching" for no reason; it's just not as fun of a combat system for SOME people.
Different strokes for different folks; however, I can't disagree more with the complaints of it feeling like an mmo or that it is too easy. Complaining about the UI or the tactical mode is one thing but comparing it to an mmo? Really?