Been doing archaeology for 2h tonight. Done EK only. At start I had 1 troll, 2 fossil and 1 dwarf up, had 4 other trolls in these 2 hours, rest are fossil or dwarf.
Now to the strange thing. Fossil almost always turns into another fossil digsite. And dwarf into dwarf.
Same for anyone else? :S
If this change is intended (and if it is even a change, as a start), then you cant focus on flying extra long to get the digsite of your choise, to focus. You will probably end up having only those you don't want, after a while (this is what I did when I started out today).
If this is a change, then best way to focus on something would probably to be to always take the one closest to you, no matter what.