Whats the point of power zones if I can't change them?

My Venu 3 allows power zones and shows them no problems.  Apart from they can't be changed.  I'm a heavier guy and i'm ALWAYS in the max zone for power by a long way, 

 

Can we please alter the zones on the Venu 3?  229w is my max zone.  On a zone 2 run i'm averaging 350w, when i'm doing intervals I can hit 600W+