This is heartbreaking.
Wow it would be nice to know how hard this is going to be to provide. If this is 'too big' to expect a manner to easily migrate soon it can affect how we plan deployments. For example, I don't want do a full migration (manually) this weekend (RMA) and then end up needing to do it again with the 3S.
Does anyone with working knowledge of how the 'pairing' works. Just speculation, but if this is some sort of unique key exchange the only way for this to work would be to migrate, i.e. some how 'hand off' from hub 1 to hub 2.
Looking over at SmartThings forum it looks like similar unrest about this. Apparently a migration tool was promised and never delivered.