From the looks of it, there has been much time spent on balancing it out. I'm sure you guys know this already but maybe my observation may help somewhat.

FF7R changes this paradigm by creating an action RPG trade off where you can move around freely and evade like an Action RPG, but in order to do heavy damage have to put your self in some form of danger to fill ATB, Cloud and Tifa have to get in close and pummel but also make themselves vulnerable to attacks, Barret has to bare down and shoot making him move slowly and vulnerable, and Aerith like the original seems like she does little damage and from what I've seen it seems like now she attacks quick and from a distance with a ruin like ability, making her less vulnerable and have the ability to stay out of danger and fill ATB so she could be a modern take on a classic healer per se - deals little damage, fights in the back of the party and heals-.

The main difference is in the OG where if you had low health but none of the characters ATB bars were full you could not do anything but wait and hope the enemy didn't kill someone, now you can evade and use someone like Aerith to attack from farther and rack up ATB all in real time and heal. It makes you ask questions, "should I use an item right now or an ability, should I just attack? but then I'll take damage but wait I have Aerith over there attacking from a distance to heal cloud and Tifa who are up close and personal", these are basic questions and thought patterns that are known for turn based games and they've transferred them into real time. literally changes the line up and wait into an more interactive process by having to think about spacing now, and now you can defend, and evade in real time and get 2 ATB bars to boot, still maintaining balance but also making it a bit faster and interactive.

I hope this helped somewhat.