Sometimes, not all things are solvable with firmware (could be hardware limitations). Having said that, do provide feedback to Canon if you haven't done so already for the desired features. You can do so by visiting the Canon USA Main Page, and at the very bottom next to the copyright notice, click on "[+] Feedback" and select "Product" in the popup window.
One thing I have observed is that it seems that Canon's professional gear ends up having more firmware updates over time. Perhaps that gear is prioritized higher? Anyhow, do provide Canon your feedback and hopefully if they receive enough feedback, they'll prioritize it.
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Ricky
Camera: EOS 5D IV, EF 50mm f/1.2L, EF 135mm f/2L
Lighting: Profoto Lights & Modifiers
