Executive Meddling: As noted in the description, after Gravity was nearly destroyed by a hacking incident at the end of the first closed beta, Samsung 'saved' them by buying them out. Samsung then put a director in place to oversee the recovery of the almost totally destroyed game, who tried to impose his radically different vision on the design team. Samsung caught wind of this when a very large portion of the design team proceeded to rebel and quit, however, and pulled the director, installing someone else with instructions to leave the development be, and while some damage was done, disaster was largely averted.
While the hacking incident that almost killed all of gravity's plans for RO is famous there are some lesser known things that could had been.
there was a America (has in USA) theme town/city and dungeon planned at one point a BGM called "Antique Cowboy" seems to be all that is left of this judging by it's title as Cowboy is pretty much a american concept.
the trans second class Creator/Biochemist was originally suppose to have the animated solder pads that the 3rd class Geneticist has in their idle battle stance but players liked the look of the non animated pads the Creator/Biochemist got enough to keep them.
The Wiki Rule: Various licensed and private servers have their own, but there are a few out there that cover the game regardless of server.
The iRO Wiki, which has its own database. While only applicable to iRO, it's probably the biggest and most detailed wiki to date.