To appreciate v146, one must understand the climate of MapleStory at the time.
New Boss: Chrono Sovereign
Endgame Dungeon: Riftforge Citadel
New Class: Arcanist
v146 had one of the most aggressive "Marvel Machine" rotations. The old "Gachapon" was being phased out for the $10-per-spin machine, alienating free-to-play players. maplestory v146
If you want, I can: