Gordon say's it's something that's crosssed his mind a few times on rainy days, but these days the minimum manufacturing volumes the Pi Foundation needs to see from a new product are so stratospheric it would be unlikely to justify the design/support effort. He also commented they had lots of issues maintaining case quality with suppliers that they wouldn't want to repeat at larger scales.
The original Slice skin contained licensed fonts and images and .. I forget what the issue was, but once Kodi moved from Helix to Jarvis it got broke and noboody fixed it. IMHO the Estuary skin with "midnight" colours is nice tho