Jeffrey, I came across your site while looking for some opensource OPML tech (thanks for the plugin by the way) and ran across this post on Wallabag. I too had a similar problem/use case and wanted to get out of Pocket so I could better own my data. I ran across the PressForward WP plugin which does a lot of fun stuff towards this end. I've written up some thoughts about it when I did it. You might find them useful if you haven't settled on a solution for yourself.
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