Health bar is not that important for new combat system compared to armour. It is better to give +3% hp and +5% armour than +7% hp and +3% armour.
Other options even weaker. You can cast one or more cc effect every turn with every character. Enemies can do the same. So, pure hp bar is not important at all.
E.g. for 5lvl party it is simple to take out enemy with 10k hp and no armour. Yes, it will take a lot of time but it pretty straightforward. But 10k armour and 200-300hp with healing spells, for example, is way too hard, close to impossible.
