Game is a completionist nightmare, especially if you do the Colony Rebuilding side mission that requires you to hunt down rare materials that drop like every once in a blue moon. So prepare for a 100+ hour run if you wanna do all the optional shit. When I finished the JP version a couple of years back I did a bunch of sidequests but eventually got tired of them and just skipped half of them. Still clocked 98 hours or something.
It also means you'll get tons of extra XP and you'll be overleveled as fuck, draining all the challenge out of normal battles. It's almost like they're expecting you to not do everything.