Yes, this has been an oft repeated request - but;
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It’s hardly a “show stopper” … there’s a raft of effective alternatives for image evaluation; many of them totally free to use.
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Even if DxO were to provide this feature within PL, I doubt many would be happy with the (likely) sluggish performance - as PL needs to render each image from a list of corrections - - from scratch (that is, PL is a non-destructive editor … it’s not simply throwing the encapsulated JPG up on the screen).
John M