Yes, I would feel better if the title and description were changed to a term not associated with the PS5 trademark. The asset itself contains no discernable copyrighted content, though.

EDIT: Fixed, thanks! :)

You don't want to use free assets but you're asking for free assets to use?

I get where you're coming from, but the artists you're asking to work with you will have control over any content they create. Most artists working on a 'labor of love' project (aka not-paid, profit-share, 'free') prefer to release for free (non-exclusive) any assets they create for the project. I think you're going to have to decide which is more important; using assets that are free to everyone, or paying for exclusive assets that are unique to your project. 

Remember that using non-exclusive assets doesn't remove the uniqueness from your game. The things that set your game apart are the gameplay, narrative, how you are using the assets... not the assets themselves. Also keep in mind you browse game assets, but your players do not. Players don't care that they could download the assets found in your game. Well, some do, but they tend to like your game more because of it.

If you can't pay money for assets, you'll want to have something else you can pay with. for 'labor of love' projects, that's often the shared passion for the project. People can't see the vision you have, though. You have to share that passion, not just expect it to infect others naturally. 

Which is the primary purpose for this sticky post: https://opengameart.org/forumtopic/how-and-when-to-write-a-good-art-request

One of the more important points on the post linked above is:

"Have several hours of real gameplay.  This isn't just wandering around randomly generated terrain.  Real quests, real NPCs, real levels, boss fights, whatever.  The art can look horrible, but if you're asking people to work on your project out of the blue and you're not already established, you need to be prepared to show people that their art will be put to good use.  ... you just want to provide a good amount of gameplay to prove that you're dedicated and able to finish your project."

You mentioned most artwork is currently placeholders. Perfect! :D Use free art found here on OGA to flush out those placeholders and share a playable demo. A demo that looks like garbage will attract far more artists than a pristine looking game that no one is allowed to see.

You may not repackage, redistribute or resell the assets, no matter how much they are modified.

You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.

Those are things the CC-BY license permits. PixiVan, would you be willing to remove those stipulations? Not just because it conflicts with the license, but because it creates massive problems for anyone trying to use them in a game they may plan to distribute. The inclusion in the game could count as repackaging. The distribution of the assets for use in their game could count as redistribution. Selling their game that uses the assets could count as reselling. I get that the purpose is to say "no redistribution or reselling by themselves" but that is nearly impossible to effectively enforce without also preventing people from using the assets within a game project as well. 

Until then, I must mark this as having a licensing issue in order to protect these assets against usage you may not want. Let me know if you have any questions.

If the only difference between two submissions on OGA is how the sprites are arranged, that serves only to clutter an already under-curated archive of game assets. If there is significant value added beyond simple rearranging, file format, or packaging: Sure, that's great! Otherwise, that's essentially duplicating assets and bloating the archive. OGA will not encourage that kind of thing.

I do, however, agree that adding additional arrangments of assets to an existing submission is always better. For example, I would encourage submitters to include both a spritesheet, and package of those same individual sprite files, if they are willing.