It's a surprise to no one that Square is disappointed in sales numbers. As the article says near the end they are infamous for being disappointed with not meeting very unrealistic targets. I don't own a PS5 to play it on, they haven't been in stock locally consistently. But from everything I've seen about the game, it's a middling to good game. So middling to good sales numbers should make them happy. And from what I can tell the numbers say that it's selling better than that.
I'd be willing to bet that the game will be available in a compressed format from a repack site with no content loss. At least 30% smaller. A recent example that I just checked, Forspoken, Original Size: 103.9 GB Repack Size: from 63.6 GB
Before I had an unlimited connection for monthly bandwidth usage I would frequently download an already purchased game from the repack site and then have steam "repair" it. Shadow of Mordor/Shadow of War come to mind specifically. Saved so much of my limits at the time.