Any chance you could have an option to round to the nearest gold, or just hide the silver/copper? Or make it auto hide once at max level?

Yeah, something like the existing Short form, but without the Silver decimal, and with thousands delimiters:

Current Short form: 1234567.8
Better: 1,234,567

(The Silver decimal could optionally be added for amounts <100g, but for everything else it's rather pointless, IMHO.)