XE had to come later, it's Rogue. And GX5300 is an SGX, just one specifically optimised to be as small and as low power as possible and aimed at IoT-esque things. Maybe we've done a bad job of explaining what GX5300 is and why it exists, but it is not a general purpose Mali-400 competitor. The market has moved on, embedded GPU thinking needs to catch up a bit.