PSO2 atm is all about EQs, 13*s, and stones.I have not played in months, sell me on the changes!
Currently the most popular EQs are Profound Darkness (which drops Caligula stones and Nero stones, which are required for the current best 13*s), and any EQ involving Dark Falzes, be it the large forms or hunar forms (any form of Dark Falz can drop Nero stones).
Christmas 4 also introduced another new type of stones, drops from Dio Hunar and can be traded for Ares weapons...
Next update will introduce yet another EQ, TD4, scheduled only, it will add yet another new set of 13* weapons, but, other than them being obtainable as drops through TD4, they can also be obtained through 2 more sets of stones, 1 type of stones that can drop in all TDs and another which is exclusive to TD4...