What's the big deal? The more data, the more precise the calculations re ethnicity. My own estimate, based on new info, deleted the following:
Scandinavia 9%
Iberian Peninsula 4%
Europe East 3%
Europe South 2%
and left me with
Great Britain 84% (Increased by 68%)
Ireland/Scotland/Wales 14% (Decreased by 12%)
Germanic Europe 2%
"Great Britain" and "Germanic Europe" overlap, however, which matches what I know of my family history: Mostly British on my mother's side, very much German on my father's side (including the Alsace region of France, which was Germanic at the time my ancestors lived there).
From what I've found, ancestry.com's DNA results are becoming more accurate.