There will be redesigns of the case.Once the case is finished, that should be the final case for this company as long as possible. If we never designed a new case again, it would be great, and I think that was the point, what with how the CPU board is designed to be upgradeable. The form is for function, with aesthetics working around it.
The lid could be made thinner for example without affecting any of the internals.
Also there might be an USB-C variant at some point which also would require a case redesign.
That is not against the modular nature of the device.
If you want to upgrade to USB-C, keep everything but but the mainboard and the bottom housing.