I'm going to say yes on the 2nd tank because the 450x they ran at Dakar had that set up last year. Thats why they use the low pipe.
You don't need this much fuel capacity or navigation for Baja and the article doesn't mention this being a Baja bike. Pretty sure its just for Dakar.
Yeah, I believe you're right on that. JC will be on Honda's Dakar team.