That's sad, to be honest. I imagine the development schedule must be always tight and your teams should be busy implementing different content into the game, but I really hope Archaeology won't be treated as a dead skill (max it, forget it) but rather as a questline (always releasing new content). Overlapping content, such as releasing digsites with levels too close to one another, isn't a bad thing in this situation - to be honest, I for one believe players would love having different options of where to level without necessarily having to worry about efficiency.
Say, if you released a Fremennik digsite, based on scandinavian culture, at the same level bracket as Warforge!, giving about the same xp/artefact, people would likely alternate between digsites for a change of atmosphere, or to complete different collections.
If we had a Serenist digsite, tolkien-ish elven or even celtic to an extent, at around the same level as deep Kharid-et, you could even make a link ...