Ping spamming SE on cron run

i checked this setting named Submit sitemap to Google on cron run, but after a while i saw this nice feature pings google every cron run (what the text says - ok). But therefor every hour, we tell google there are changes, please re-download the sitemap. This makes no sense and I'd like to name this Search Engine ping spamming.

I'd like to use the "on cron run" setting, while i think it is much much better to do this pinging on hourly basis. For e.g. if i changed an article, saved it and then re-edit this one within some minutes, every "save" will do a ping to google, if Submit sitemap to Google when updated is active? I think i can really name this ping spamming!

please change the code and only do a ping "on cron run" if there have been changes until the last cron run...