What happened to characters having unique roles based on their character

To put this as simple as possible there is no way in hell that the cog would allow baird to go on a escape suicide mission. Before launch wasn’t thier whole reasoning behind not everyone in every mode to preserve the character traits of a specific character. I can forgive guest characters

The reasoning was not applied to individual modes, but only the characters themselves. It was stated well in advance of launch - when Escape was revealed, in fact - that characters other than the Hivebusters would come to Escape, with Kait being used as an example.