Yep, I'm genuinely happy for everyone who can enjoy games like this with friends and family.Well, I for one welcome the co-op. There's only so many games with co-op done right that I can enjoy with my wife, so I am looking forward to it.
I don't think it makes more sense than for any other non-DnD turn-based RPG.And besides, these games are based on tabletop RPGs, isn't the whole point of those to enjoy and share an adventure together with friends? Co-op makes perfect sense for a DnD game, imho.
I would really like to play special modules/adventures for those games as a group with an actual human game master. Thus a game master mode would be necessary just like in NWN.