In case anyone is curious about the progress here (still no answer for sure). If you export to Wordpress, create a pro Wordpress account - use a plugin that is used to keep your media when exporting - export the content BACK OUT, then import it to SS, you can keep an archive of the comments. It won't have the same avatar/account info for the comment, but the name/comment/date is still there. But you lose any none text + image formatting/layout in each post so you would have to reformat EACH POST.
Plus you would have to work with the Wordpress blog url formatting (year/month/day/post-name) so. you might have to change that, on top of reformatting).
Honestly, none of these options are good when people are professional bloggers...