EVE Online's new Inferno expansion is almost here, bringing with it a massive PvP revamp. CCP will try to resurrect the dead faction warfare system, and new modules will be introduced to significantly shake up the PvP landscape for the first time in several years. The war declaration system is also getting a complete overhaul, with the goal of forcing the aggressor to commit to the war and making wars more structured and meaningful. Unfortunately, the implementation described at Fanfest doesn't look like it will achieve that and doesn't fix any of the system's other problems.
The attacking corp can no longer stop a war mid-week, and the defender can hire mercenaries to join his war, but this doesn't add any risk for the attacking corp and doesn't force it to commit. The attacker can always stop paying the war bill, and the war will then finish at the end of the week. As most empire wardecs are initiated by small shell corps full of PvP alts, the attacking players won't mind logging out for a few days if the war backfires. The current war system is plagued with issues, from a complete lack of victory conditions to the fact that the attacker can pay for the war indefinitely. It allows bizarre asymmetries, like tiny alt corps declaring war on major military alliances, and offers no way for even the most militarily powerful defender to win the war.