That is a great improvement idea and please condsider this related improvement:
During the work week, drivers with long commutes must charge to 100% at home during off-peak hours only. However if the same driver on the same day is able to plug in at work, it is better to charge to only 80% at work, to extend battery life.
Just like you, I already forgot to press the (timer override) button one time. Live and learn.
My better solution, which didn't work, was to set two timers for Mon-Fri, one for home (night, 100%) and one for work (day, 80%). If memory serves, only one timer can be set for any given day.
Too bad, that would have worked great, since if I ever stayed home from work, it would have already been charged and therefore use no daytime power.