Two of Treyarch's dev team have said while they "don't think it was a filler title," they do feel they may have tried to "put too much in the game" for their short dev cycle.
Activision have a rotation schedule in place so that a new Call of Duty can ship each year with the torch passing between Treyarch and Infinity Ward.
Call of Duty 3 only had an eight month development time and they stress "but that's the real difference between this game and Call of Duty 3," talking about their upcoming Call of Duty: World At War release. "It's the time to actually iterate and get things right, to make things feel right."
"Call of Duty 3 is a very good game. It sold very well so a lot of people must have liked it," said Treyarch's Noah Heller in an interview with VideoGamer.Com. "But it's not the game this team could have made if it had the time to polish to the level they needed to."
Treyarch began work on Call of Duty 5 once they had finished the third instalment which has given them a much greater time span to work with. "The team is polishing and pouring love into the game," Heller added.
"A player doesn't know when he buys a game that this game was a year cycle or a two year cycle. He just knows about the quality of the game... This is a game where we really wanted to show what we can do when we have time," Heller concluded.
Call of Duty: World at War is being released on PC, Xbox360, PS3 and Wii this autumn.
Clickto read the full interview between Noah Heller, Rich Farrelly and VideoGamer.Com.