Single post in Upcoming Nav-Bar Changes (Preliminary)

Just asking but could there be an option to shrink the text down on the Navi-bar? Like have the option to have this size but also the old size? Because yes, the bigger size is good for anyone with sight issues since its clearer and bigger, but as someone who doesn't have that its kinda bugging me with how huge it is- Like its a tiny problem but i'm just curious if that's possible??