Eco would love to represent the site, but unfortunately he feels unable to do so at the pace that MU would play at. 72 hours (at most) and thousands of posts per Day (even with the 200 posts max limit they're imposing!) would be really tough for me.
Also Az has done it before, and while GJ and Tom would both be sound candidates, they both play on MU regularly so it might be nice to send someone a bit more MTGS native. Would definitely support Grapefruit if he wanted it - I agree that keeness is a very important factor.
TBH I think the most important factor is the ability to cope with the pace of MU games. Any of those players would be a fine representive so long as they think they can keep up with MTGS-like volume compressed into much shorter timespans.
I'd be down for cross-site stuff (MU is miraculously not blocked at work), and I'd be up for trying compromise games with, say, week long deadlines, which would be fast paced (for us), but not as totally crazy as 72-hour days.
Az or GJ are totally fine, I could possibly do it myself if we need it. I'd just get a name in now, and switch it if we need to, rather than risk missing the deadline.
Also Az has done it before, and while GJ and Tom would both be sound candidates, they both play on MU regularly so it might be nice to send someone a bit more MTGS native. Would definitely support Grapefruit if he wanted it - I agree that keeness is a very important factor.
The Spec chat is in our Discord (https://discordapp.com/invite/vhbtZak), ping me to add you to the channel.