I love all of the endgame but the weapon upgrading is ridiculous, the only element of this game I really hate.

I've finally got a Trapezohedron after saving up lots of Plat Ingots, now I'm trying to do the dismantle exploit to multiply it but that seems to be costing even more Gil...

fml

Is there any real point to doing the missions? Or is just so you can say you did? And are there any other sidequests at all?
What's the point in even playing the game? It's supposed to be fun, you know.