(Note: While they did add a mini "boss" ( it was more like a interactive cutscene) that didn't count). I decided right now to see how productive OOO+sega where for the pass 6 months. Whelp here you go:
Jan-February 26. OOO finally squeezes out an event of tortodrones (whelp better than nothing) in almost 2 months
Feb-April 2-3rd anniversary (event + promos)
Feb-April 30-ANOTHER EVENT? SEROUSLY? (Kat apocalypse.)
April-May 21 mission briefing( tutorial mini boss+mission improvements)
(NOTE: between updates where full of promos)
I decided right now to see how productive OOO+sega where for the pass 6 months. [sic]
Okay, but 6 months ago today was December 8, 2013. So you need to add the crash site mini boss, attack/defense boosters, and Winterfest.
Other game changes, which deserve recognition even if they aren't new content, would be increased Radiant drop rates, that terrible new mini-map, and accessory removal.