What makes you say that UX 3.0 does not require more computing power? I thought that was the overall point of the CCCv2 upgrade. More computing power to allow for better operation of the capabilities already onboard, plus the capability to handle new functionality of UX3.0.
When I got my upgrade installed I immediately noticed better touchscreen responsiveness and faster reaction time to commands and fewer needs to reboot. I'm told that this is because CCCv2 has twice the memory capacity and therefore more headroom. I also noticed after the 2.11 download that the system downloaded the maps for the state I live in so that if navigation loses internet connectivity, I can still navigate offline. And there is room to add more states if I want to. From that I infer that more memory / computing power is a big deal with CCCv2.