+1 for adding general relink matching options other than Filename eg Timecode, Duration etc. I've had cause to use that option in Premiere in the past, it would be no less useful in Resolve.
That said, I think Tero is maybe thinking of Resolve's timeline 'Reconform' functions (same chapter):
DaVinci Resolve has the ability to choose custom conform options to control what metadata is used to match timeline clips to source clips in the Media Pool. This means that you’re not restricted to only using Timecode, Reel Name, and File Name, you could also use any combination of Total Duration, Resolution, Bit Depth, Frame Rate, File Format, Codec, and/or Media UMID/UID to control how clips are conformed, depending on your needs and the problem you have to solve
As noted, this is for conforming timelines though, not generic Media Pool relinking operations. You can certainly point a timeline at a Media Storage location full of renamed files and the above method could be used to relink the targeted timeline clips based on your Conform Options choices, but those conformed instances would be linked to new Media Pool items that Resolve would automatically add. The original Media Pool items would remain unlinked/offline.
An alternative Resolve workflow option to consider, when discovering (after the fact) that you're working with multiple files that are not uniquely named, would be to use Resolve's metadata tag options to automatically assign unique clip names to those clips
within Resolve... its not as robust as having genuinely unique media filenames tho.