1. The original used ATB.
2. They don't have the best track record with ARPG systems.
I personally felt any FFVII remake should take the core of the original and just make it better. No random encounters, make them visible, FFX-2 style ATB with interrupts and stuff to make it flashy while still a command based rpg. Give it more depth and stuff like that like they did with FFIV's DS remake. Basically, I agree the original FFVII is too easy and my hope for a remake was taking that core fundamentals and just making it less braindead without losing the core of FFVII. Instead, they've decided to include strafing guns, combos, and all that other pizazz. I know preferences are preferences but I just don't want to do that in a Final Fantasy, especially in a remake to my first RPG.
I just wanted them to keep it grounded in what made FFVII work but make it better, but like with REmake. I just don't want action rpg combat and it's a total turn off. Keep your experimental stuff to new FF's. Remaking the most popular FF with an arpg system without providing vets that waited years an alternative just makes no sense to me.
Most game remakes work to improve the original, they don't try to be entirely different games. It's like Blizzard remaking Diablo 1, making it turn-based like it was originally planned to be, and the fans of the original are told "there's always the original stop complaining" when it's perfectly reasonable to expect the original Diablo combat but better.