It'd be nice if they engineered the optional disc drive to be a super slimline unit that slots into the console rather than something that latches on to it and disrupts the flow of its lines. Despite some design flaws, the PS5 digital is quite nice imo, but the disc drive just kills it. I think the 'Slim' & Pro refined the look nicely, but again, the disc drive disrupts the flow and the need for a stand by default in all models in all positions is a fundamental design failure, especially that horrible little plastic stiletto thing for the Slim/Pro in horizontal position.
Even if they go more simplistic and utilitarian in shape/function, they still need to make something iconic, even if it's somewhat polarising. Every PS console is distinct and undeniably iconic, perhaps with exception to the godawful SuperSlim PS3 which was pure tat. I know many people just want a boring box, but for me games consoles are the one thing I like to have that extra something visually, I'm fine with them standing out a bit more and I think it's important to the brand to be obvious.
I think the best bet will be a modernised OG PS2-style box, with some more refined lines and very clear design language. Though likely a good bit larger still.. simultaneously a throwback to the PS2 era while also hinting at something much more futuristic. I'd love to see a shift to a silver-gunmetal grey type colour too. White isn't very popular and Black is still a bit played out. Something like
this, maybe a little darker would be nice.
Number one goal would be full stability in horizontal position with no additional parts and decent stability in the vertical position by default (they'll still wanna sell you a premium stand for additional stability and aesthetics). Again, a slimline drive add-on that slots in to the console. Easy access to the NVMe. Optimal/logical placement of connections/ports. Minimal physical footprint while maintaining near-silence by way a of excellent thermals (big fan?). Easy to keep clean (no excessive indentations/ridges that a difficult to clean or fingerprint magnet surfaces).