After playing with a 6+ at the apple store while waiting around for my 5S warranty replacement, I gotta say there's a lot I like about that phone, but one thing that really ticks me off is the fact the keyboard cant split like the iPad can. I mean, what were they thinking? Even LeBron James would have a hard time typing with the key placement on the 6+ landscape.
From what I heard, it's also not possible to deviate from the iOS default layout in these third-party keyboards either, so we're SOL.