I personally found the G19 display very useful, in the few games that supported it.
One of the biggest missed opportunities was in the recent Alien/A:CM/AvP lot, where that would have been perfect to put the Motion Tracker - The screen size is almost the same as the display in the original prop, too!
Others could have it as an option, or somewhere to display non-essential info rather than burying it on a tab under the sub-main-side map menu, or something.
I don't usually find it a problem to just glance down at, as it's no different to checking the speedo on your bike or car... but better as the focal adjustment for your eyes is far less and setting the G19 brightness about the same as your monitor helps even more.
Very under-utilised feature, IMO.