I reckon the karate monkey in the legacy section is a different year… 2010 had (I think) a non-moudlar dropout, it was a track end with a derailleur hanger below (I think the whole thing was cast, not a brazed on hanger?).
for bikepacking, I really dont know what makes a good or bad bikepacking bike. It can certainly be ridden like hell off road and I’m sure is overbuilt, even for 20kg of bags in addition to the rider…
Its way steeper than the current stuff, so may be more twitchy? But I dont think that really matters and can be addressed to a fair degree with cockpit. The key is either slamming the rear wheel or getting a strong QR/10mm both through, maybe with brass washers, that will bite hard into that dropout without using tugnuts, which arent the end of the world, but a bit of a bummer when fixing a flat or transporting in the boot, etc. I’d bloody love one, fwiw. I guess you can see braze on situation in flesh or in pics, and again, lack of can be worked around. How much he spend on frameset? I hope fork comes with?