It would be nice if the padding on the "live preview" window would get reduced... a lot (the padding on bard is hugej for example). Here is an example: https://imgur.com/a/qmc6twJ
The first image is normal statamic:
The 2nd image is with padding on many things reduced to 5px:
I just saw Jack posted a sweet update to the live viewer here: https://v3.statamic.com/blog/live-preview
This should be a pretty easy change as well (since he's already messing with live preview) :).