I tried making use of the full screen width instead of just centered content with empty spaces on the sides. If I would hide the search UI on the left and stretch the item's content across everything, it would indeed, as Aeronaut pointed out, look somewhat out of place (especially so on high res screens). I also tried to make everything more browsable, minimizing full page (re)loads.
I wouldn't want to change up the concept I have right now, but could instead add different display modes for the item browser. For example; use mobile view on desktop (mobile view currently hides the search UI when you select an item).
As for curves; I can't promise they are 100% accurate. The data comes from the game's files but currently only shows data points in 5m steps. I would say its in an "alpha state".
If there is anything else you would want displayed on certain pages, I can definitely look into it.