What we've never really had is a maelstrom mission, mostly because the ship limit prevented it.
It'd be so cool to have like 100 fighters and a few dozen caps with scripted beam-fire, in a tight ball all swirling around chasing each other and you've got to do something stupid like keep Beta 3 alive while it shoots between way-points on a path designed to give maximum dramatic effect. Like the final battle on DS9. Ships exploding, beams grazing your shields, Mara's on your tail and Cain's wiping out dozens of yer squads wings. And you in your Pegasus having to impact missiles to stop them reaching Beta 3.