While I see your point, based on what you are saying, it would still take a developer's resources to implement those DLC's when they could be working on critica

While I see your point, based on what you are saying, it would still take a developer's resources to implement those DLC's when they could be working on critical bugs (because you are saying the people working on DLC's are just designers, not developers also). If they were also developers, then that voids your argument, because then they should be working on the bugs.