I'd like to think that he felt somewhat responsible for what ended up happening to Kamille and if it didn't go down like that Char would've been comfortable to return to the AEUG and continue being with Kamille. While I don't think he'd end up in Londo Bell, it definitely would've avoided all of CCA

I feel that both becoming a mentor figure to Kamille and the experience of working/fighting alongside Amuro really opened the door for Char to grow.