Alternety, I think the biggest barrier to making that information available may not be available resources. Instead remember that the UI already gets some small complaints. Adding any more complexity without a better screen (which can convey more information, such as more exactly what the values it is displaying pertain to) will just make the UI harder to manage.
A fair number of folks are probably ready to pounce on a charger which can display all that stuff.
On the fan business, see my post #20 in Old-Lumens’s Nitecore mod thread for my thoughts on shoving a fan under or behind the charger. Chloe and probably some others were also throwing good ideas around.