It has been previously stated by SD that if you lack a certain class, victory is impossible.
However, there are two teams, one of which must reach an objective, the other which must defend it. Does this mean that the defending team has an option of using one class and still clutching (although the opposite may be advisable), whereas offense must have diversity? Or does this mean that regardless of what team you are on, if you don’t use all of your classes at some point, your team will automatically lose?
How exactly did defensive objectives work in ET? (because when I play Cod/Gears/Battlefield, all of them do not have actual defensive objectives.)
I’d imagine defensive objectives just slow the onset of your enemies or seal off certain routes until the offense counters it with another objective (ie blowing up a door/hacking a terminal to reopen any door sealed by an engineer).
[edit:] Can defense stack classes?