Oof, I was fortunate to never have a 360 RRoD, but I knew people who did. Were you ever able to get it repaired or exchanged through Microsoft's extended warranty program?
I didn't finish Lost Odyssey because I eventually lost interest. The premise was certainly interesting, the music was very good (Uematsu is a genius), the dialog was well done, and the gameplay was fun. What slowly drove me away was how depressing everything in the story was. It felt like every single story beat was trying to be devoid of any hope or joy.