As I have posted earlier in my life I want more TIME DISPLAYs:
 
Tonight I want THREE, all selectable, so I can see:
1  NOW TIME   Measures
 
2  NOW TIME   H M S
 
3  AIM TIME
 
Is this so wrong?
 

I wouldn't mind being able to display both H:M:S and M:B.T on ruler. Reaper has this.
 
I think Cubase has an intresting solution having these ruler tracks - so you can put these where you need them right above a track and have any display on this. And you can decide to split view at ruler to always have it on top and some settings like that.

You can show 2 now: one above the left hand pane of the track view and one in the control bar.  Almost there...

If only talking about NOW Time - you have big clock as well. Every click inside switch display format.

I have two time rulers showing. But it is not easy to read them quickly
 
Having to change the SINGLE display is not convenient.
 
And having the AIM time displayed can help lots when not way zoomed in.
 

Good one, and easy to implement: just allow the 'big time' to be configured in flexible ways: samples and seconds, or MBT.   Check the kind you want to see, and get three big time windows or four, or perhaps one window divided into 4 displays.