Thanks for posting. It's sad but true that the forum is not very active anymore. Since the Oni event the three most significant things that I can think of were:
1) Some basic increases in max levels of things (leader XP level at 195, merc storage limit at 99, leader crystal limit at ??). Most newer mercs are by far stronger than leader still.
2) Reweighting of all the procs. Most R & E mercs now have max proc of 45% with a few at 50% and the very rare 70%. L and B mercs are all at 70%. (There may be some old L's that they didn't get bumped to 70% and there are definitely a bunch of R/E mercs that are still stuck at 30%). They said they wanted to standardize everything, but in the end it's just as varied as before but at least better rates.
3) Over the holidays, they had a "log in every day for the next five" promotion that could net you two double-skill L1 Paindeer mercs. They are still non-tradeable. You may have noticed that nearly everyone has either an L1 or L2 of this type. It is evolveable to L3 for those that forked out the money to pick up the extra copies.
Other than that, it's pretty much the same platform. No updates since July 25th or so. No new levels to the original story line. We are still waiting to be able to board the Cardinal ship to get off the planet (if that will ever happen).