@Antares I like the idea. I don't know how doable it is in fred just yet. A workaround would need to be found.
Delenda Est as it is now is a simple conversion, meaning it was modified with the primary goal of being a technically playable multiplayer mission. The single player version of Delenda Est used carefully scripted sequences to promote a more cinematic experience and to keep gameplay under control. E.g. the Carthage is attacked before the... <spoiler> happens. I have purposely kept many of these safeguards in place (guardianed turrets and such) to preserve the authentic mission as much as possible. That original model, of course, is subject to change.
There have been suggestions for an update on the Delenda Est mission. Some have included; a surprise last ditch effort attack from the tevs (bombers?), warships such as the Leander jump in for a second round of fighting towards the end, the <spoiler> happens and players must face the final threat and defeat it as well. There are many possibilities, thanks for sharing yours.
I have considered ideas about taking the BP modpack against the shivans in a gauntlet style mission. I was thinking of a shivan gauntlet where you play as the Vishnans. The lack of weapon variety is one of the things which hold me back from jumping on that idea. Ignoring plot, gameplay wise a shivan gauntlet with UEF, or perhaps any terran(human?) fighter at your disposal might be a good idea.