>We probably won't be able to add these dumps to Redump until there's a dumping tool that can dump both partitions at once, to ensure that there isn't a gap between them.
I don't see the problem adding the good-two-tracks to redump even through additional data may be missing. Similar to how all the data for CD-Rom discs have subchannel data that can't be perfectly dumped afaik or CD-Rom's with DRM may still be added to redump - but require MDS dumps to actually play.
If the two ISOs are perfect dumps of the data they contain, then they should be added IMO, their integrity is not compromised, only additional data may need to be included later.