Inside Mac Games has published an interview with Bungie's Hardy LeBel, Lead Designer on third-person action game Oni. Among the topics discussed is the decision to remove multiplayer from the game:
The biggest factor in the decision to remove multiplayer support was the technological hurdle. We had been playing Oni over our office LAN and consistently experienced serious problems synching up the characters in multiplayer battles. The combat style in Oni focusses on precise timing and manuver so we decided that it made more sense to apply our technological and artistic resources to refining the single player experience, rather than continuing to develop a gameplay mode that would benefit a (relatively) limited number of end users. It broke my heart to do it, but I still believe it was the right choice given our circumstances.