Obviously I don't have the knowledge to judge this so this question may sound odd but will ffs2ea have any support of the existing data rescue solutions? I mean for example photorec (
https://www.cgsecurity.org/wiki/PhotoRec) which works pretty well -this year it recovered me around 20000 jpegs (some partially, some exactly) I deleted occassionally. By the way, it's not only good for image files and although the current version needs a small patch (can't recall, just a one liner) but it can be built from source.