I'm just someone who likes difficult rpgs and can't play games without tryharding at them (half joking). I understand that there are reasons like pacing and accessibility for a game to be easy and maybe a harder game wouldn't work well with the lighthearted story (which I really did enjoy). The reason I mentioned it was actually because there was enough depth in the combat systems for me to want to optimize in the first place. Honestly, if a postgame boss gave a real challenge, or if refighting bosses gave you the option to fight a version of them with increased stats or let you fight them like a boss rush (or some other optional point of difficulty I haven't thought of), any of those would probably do a lot to quench my thirst for optimization. Again, I still really enjoyed the game, including the combat (lining up big turns is still quite satisfying, changing attack plans based on resistances keeps things interesting, and one of my playthrough's highlights was my fight against nature idolbeast taking 36 turns due to me getting in a bad stalemate situation and having to figure out what my out is on the spot).