Change "settings > visibility-loading" UI
"settings > visibility-loading": In the individual calendars setting split up "download-visibility" into three separate things:
One tickbox (yes or no) for "sync" (unless you want a list where you could choose form "sync -upload-download"
And another List for "visible-not visible-google visibility"
And one button to "force reload"
Display: in the list with all the calendars , for readability, do not show words but replace them with three icons.
For example: visibility=icon-eye, sync=roundandround arrows, force reload=exclamation mark
This could possibly give you the option to somehow access the visibility-setting on CalenGoo's main page.