Not harsh at all.I think the SHA-1 hash verification is a better idea. If every "used" file can be successfully decrypted and the headers etc. are in tact, the game should be 100% playable. Since most people store scrubbed games, it makes more sense to use a verification method that doesn't rely on having the full unscrubbed image. It also means that any disc can be checked on-the-fly without the need for storing a list of valid hashes or any kind of pre-calculation.
I've never really been interested in using full disc images. I haven't even coded a 1:1 copy mode that exists in libWBFS because I don't see any point to keeping the junk data. I hope that doesn't come across as harsh or whatever, it's just always been my opinion, even before I started with WBM.
Having a database where you can verify your scrubbed images is certainly ideal, there just isn't one at the moment. I don't advocate for keeping garbage data, I simply verify my dumps in their full ISO form, since it is the only way I have. This is not too much of a hassle to do with a few tools, so I can continue to do that until there are other ways.
Thanks!