The dock with discreet gpu still need a power and fast ram configuration. In the end, what you’re removing from is only the cpu and all else must be powerful enough not to bottleneck the gpu.
And with that scenario, how much are you really saving with the dock without a cpu? $50? At the price point at which it is targeted (graphics whores), a $50 difference is a drop in a bucket.
And so a full fledged PRO version is a better deal.
A better system would be what
James Sawyer Ford
came up with. A PS6 normal console that is small and portable enough to be docked (or at least connected) to a portable battery, with oled, and PS buttons that look like a bigger PS portal.
The PRO version will still a traditional playstation console. Big and 250w power draw.
Buy a game and you can play in both regular ps6 and the pro. Similar to how it works now in ps5 and the pro.