I think that timezones are a minor issue rather then the main source of the problem.
BitD do not enforce attachment to characters. Most system Adam GMs do, and if they don’t, Adam strongly pins the players to the characters, day 1.
In BitD you do a hell of a lot of planning. When the action begins, you make a retrospection to planning again. You always remain zoned out, detached from your character, unless you specifically try not to be or the GM does it for you.
Adam does this thing that Joss Whedon does in Buffy - when a character gets into a mundane situation that does not involve magic, killing or shadow dogs, he still GMs by exploring how that situation affects the characters. A conversation with a flirtatious dwarf on the balcony or watching you react to Rajani having a girlfriend - something that has nothing to do with story, mission or mechanics.
BinD is John’s baby and he always returns to the rules, and the effect is, even though they have those badass portraits and 11 weeks behind them, the characters in Blades still remain very much a blank canvas. And for chrissake, it’s Wheat and Geoff’s characters. Shouldn’t have happened.
You will not get higher viewership by moving the show, not as high as you wuld like. What you can do though is put Adam there. He can do his stuff there, he and John do have a chemistry, and you already have a lot of Blades sessions where a player sits out. John has to work Adam in, but they are both pro storytellers. It will not be an issue. And people are yelling to see Adam play a character, so you’d kill two birds with one stone.