Note that this is a personal opinion based on their output for the game, much of which I didn't care for. I've never met either of them, never exchanged so much as a single word with either one of them, and I wouldn't know them if I passed them on the street. You, having worked with them, might have different thoughts on the matter. 
You know, I've read stuff they've each individually done for other game systems, and generally, it's not bad. As well, I'm sure they're fine people -- or at least okay, right? But what they wrote for Shadowrun -- England, that disgusting obscenity that is
Imago, 99.95% of the
Prime Runners book -- it's just
bad. Arrogant, contemptuous -- Patrick, I cannot agree with you enough on this one. Apart, they're okay; together, they're an ecological disaster.
What particularly gets my goat is the fact that 'no matter what the runners do, they cannot understand XYZ'. 'Person Q has stuff / knowledge that will always be better than the PCs.' I mean,
really?? I could understand this in a piece of fan fiction -- you know what I mean. "Teachdaire is k001!!! He has a Thing that lets him Hipnotiz every1 in teh r00m when he walkz in!!!1!' Every GM in the world -- okay, all the ones I've ever met -- would laugh the character out of the room. England is Bigger and Better and Bestest at magic than everyone else in the world, and they're so neat, and and and ...
... but let me tell you how I
really feel ....

Like I said -- all their writing would have been fine -- or rather, tolerable -- if it had been fanfic. That it was written, approved, and made canonical makes me wish I could tear out the portion of my brain where the knowledge of their writing survives...