If I didn't know any better, one could perhaps detect a hint of jealousy there!
Also, your statement appears to not take into consideration the following:
1) Chris would not be joining the InXile team solely for his writing skill; I'd suggest that his veteran experience as a core game designer would also come heavily into the fore.
2) A well skilled writer can generally adjust their style and tone to suit a particular audience or need. I'm sure I'm not the only one who was given tasks like this in high school. Thus, the style we are used to seeing from Chris may not be the one we'd see in the Cairn of Horrors. He'd be writing for InXile and the Bard's Tale IP after all.
I'm guessing MCA would be champing at the bit to get his inner bard's tale Dungeon Master hat on and start designing all forms of devious terrors for players to encounter. It'd be any devout fan's/early cRPG designer's dream.
It is definitely a smart card played by Brian. Still, realistically speaking it's a long way to go before we get there yet…