As far as I know, the code for blog comments has been reworked, and should be working fine for Wordpress
Migrating from Discourse to NodeBB
I suspect there will be a lot of customized stuff that we end up with when we actually do the import (though to be fair, while I think NodeBB is our leading candidate, it's not a done deal yet). We did a partial import from CS to Discourse, so a lot of the user deconfliction has already been worked through.
Most of what we do seems to be non-traditional.