(Modified post from another thread)
EVE needs a WarDec style that encourages continued operation, and even upping your game, while under a Wardec. This should be something dynamic that people can participate in under their own schedule and not (necessarily) something that requires a full-on corporate/alliance slugfest to decide.
Use the ‘Agency event’ interface to break corporate activities down into smaller pieces, which can be completed solo or as a team/corp, and award points. A WarDec would become like a player-created mini event.
The target corp has smaller Agency-style goals like ‘earn 1 million in bounties’, ‘Complete 4 Security missions’, ‘Mine 5,000 m3 of ore’, ‘Complete 3 Relic sites’, ‘Kill WarDeccer Ship’ etc. Those mini-goals would be repeatable and earn X points each. A certain number of points would be needed to resolve the war. The attacking/declaring corp could earn points by attacking/disrupting the target corp activities, scoring kills etc. and win that way.
The WarDec corp posts a War Bond as part of their wardec. The Wardec type or possibly the Target corp type/goals would set the template for the tasks they need to complete to earn points. If they earn enough points, the WarDec is over and they get the bond (or some other corp benefit, perhaps). For the WarDeccer, they get hunting rights.
Note that paying Concord for the war is one thing (WarDec fees), posting the WarBond is a separate expense. (Alternatively, the War Bond could just be 50% of the WarDec fees)
The ‘points required to end war’ could be set based on the Target corp size at the time of the Wardec. Although as mentioned elsewhere, possibly factor in corporate activity levels in the previous 30 days or something. That way, corp jumpers would be considered ‘undesirables’ as they abandoned their corp to earn their points with fewer members, and ‘corp membership would mean something’.
Concord could toss in something like Faction/WarDec LP, in which case Wardecs could be a bit like mini faction wars that don’t nuke your faction standing. These rewards could go to either side, possibly scaling on how rapidly they win the war (fast resolution = more points). Some careful design needed here, possibly based on actual ship losses or something, so that people don’t simply set up milk run wardecs for the points.
Another wrinkle would be ‘Merc Wars’. Corp ‘Nasty’ posts a ‘bounty’ on Corp ‘Target’. Corp Nasty specifies goal as ‘X Ships killed’, ‘YYY ISK assets destroyed’, and/or ‘N Space structures destroyed’, using the Contract interface. Corp ‘Hunter’ picks up the contract, then has to WarDec Corp Target using the above structure (post a bond, War goals and points set by scaling slider corp size vs corp size/activities etc). Corp Hunter renews the WarDec until they either complete the bounty contract, at which point they get the bounty (plus any loot/spoils/WarDec LP). If they fail either the contract or the war (because Corp Target completed the needed points, or contract time expired or something), then Corp Target gets paid the War Bond, plus any Faction/WarDec LP they earned.
Now you’ve got a flexible wardec system, using (mostly) existing mechanics, that creates some balance between larger attackers and smaller operators, and gives everyone a reason (and the ability) to participate. It also gives corps tools to use in wars against other corps.