The EV and Samples/Canister missions are pretty good... but I feel like DB could also use variants of them like Heist Missions (which is basically a variant of the Samples/Canister missions but with a new setting like a Bank, with rooftops, ziplines, and a waiting helicopter or something).
The Heists could even be "competitive" in nature.. like both teams are "Attackers" and the Bank has like an unplayable faction as enemies (and of course teams can still kill each other). And just to make it interesting each round reveals what item is being put up for the Heist (eg: Equipment Case for each member of the winning team, 10,000 credits for each member of the winning team, etc.)
Other types I've thought of would work are VIP Rescue/Hostage missions. BRINK used to have these and I think it might be a good twist to have an "escortable" that can have a dynamic path and not the set ones used for the EV's.
What other new mission types, or mission types similar to other objective based shooters, could fit or be given a new twist within DB's quirky universe?