By directly connected monitor here, do you mean a monitor connected to a GRV-EPIC? In that case, yeah it’s going to have more vertical viewport space than Chrome on a desktop due to the lack of window chrome.
Changing things to take the vertical viewport size into account when scaling isn’t likely to happen at this stage, because it’d probably break the layouts of a lot of other customers out in the wild.
If you’re interested, there’s a fairly comprehensive breakdown of how the scaling currently works here: Resizing Gadgets in Groov Build - #6 by Jonathan_Fischer