I have no porblem with being open, as it's best to be so we iron out any potential issues we might have. I only have potential issue with two people grading:
First, Riley and Abdel. Nothing to do with them being biased or anything like that, but I'm not sure they've graded that many times and are still learning each card. I'd have them grade lower end matches where there isn't much pressure on them being before allowed to grade anything with a main event status on it. That's kinda' obvious and natural, though, for anyone just coming onto the GM team/starting to grade.
Secondly, Axel. This was a few years ago now, granted, and wasn't in this fed but he was randomly given a match to grade in TNL and is was shocking, frankly. Because iLike was involved in the Triple Threat match he graded (which had 2 other 2WWF guys in, whom names I can't remember), he was obviously bias towards the 2WWF guys and his lack of liking to iLike was ridiculously evident. I have no idea, however, if he'd been like that before or since. I'd be afraid that that would seep through again in some form, even without him consciously knowing it. A couple of others might remember this too, maybe Kani.
Everyone else on that list I would have zero worries or complaints about grading any match on the card.