Do you have any tips and pointers?
I quote myself from above:
M2tklib is a strong library to enter data and menus. It is not a perfect solution to display something. If you only need to display something, you do not need M2tklib.
What about this: Make a list of all the sensor values you want to display. Combine these value onto groups which fit on one graphics pages. Maybe you will end up with 3 different pages of sensor values.
Initially you will display page 1. If the user presses a button, then display page 2. Another button press, display page 3. With one more button press, page 1 again will be visible.
Your additional requirement, that the values needs to be updated more often, is independent. Just let u8glib refresh the current page every second.
Oliver