Rebirth does something with the open world mechanics I haven’t seen in other games. It interconnects everything.
The life springs give you a shitton of materials for the crafting system, they reveal the locations of crafting recipes, and eventually the area boss.
All of which interconnects with side-quests, not just at the start as a tutorial, but throughout each region.
It hence manages to make you want to do everything, almost on accident. If you do all the sidequests, you progress the collectathon a bunch. If you do the collectathon, you end up progressing quests a bunch just by “coincidence”.
Add to that the fast travel that lets you jump anywhere instantly, and nothing ends up feeling like a chore.
The synergy skill that allows you to have another party member throw you into the air at an enemy, when controlling a melee fighter, (Tifa, Cloud, Red) is so satisfying and welcome in Rebirth when fighting flying enemies.