I moved countries a few years ago, but have always maintained my Google Adsense in my origin country, out of fear of losing account history. With this comes unwanted exposure to foreign currency and all associated fees and quirks.
I'm wondering how important this account history really is? Can I just create a fresh account in my new country and change up my ad unit codes or will I lose significant amounts of revenue as Google re-asses my website's worth to advertisers?