The nests all migrated when the new Pokemon were released, which is cool. Nests can now be Gen2 species. I experience the new "critical catch" where the Pokeball only shakes once and there's a different catch animation (not the circle of stars that normally shoots out). You now get extra candy for evolved versions of Pokemon (5 for 1st tier and 10 for 2nd tier) and 50 extra XP for a first-throw catch.