I definitely don't want to see more of what made him break. Some fucked up shit happened to him and his mom. I'm hoping you just want more context of why all that happened in the first place, which would probably be interesting
Pretty much that. I don't have the best memory in the world, but I don't remember hearing about what made him break in the first place. Because his story was a hell of a lot more interesting than Jowys.
It's not reported in the game, but from some sources from outside the game (creator interviews I believe, not 100% sure of the exact source).
Basically,the mayor of Muse city hired a bunch of bandits to attack the Highland royal caravan. Luca's father Agares fled. The bandits then turned on Luca's mother - he was forced to watch as they raped her. Luca's half-sister Jillia was born as a result of that rape. This is not really alluded to in the game...there *is* a section where Luca remarks that Jillia shouldn't cry about Agares's death since Agares was not actually her father, but that's about it
People put too much importance on Luca. The main focus should always about the bond between Riou and Joey. I believe they made that pretty clear from the get go. They were fated to face each other no matter what and no matter how strong their bond as friends were they were still compelled to fight.
Luca basically went insane over a traumatic experience as a child so he just wanted the world to burn. It's pretty generic if you ask me.
Yeah, the stuff after Luca was. Definitely not as thrilling or interesting. They should have used that plot point earlier. I know it ties up loose ends from the first game, but it really didnt feel like it earned to be right after the climax of the game.