This really seems like it is becoming VERY cumbersome requiring many changes to the system which will likely be quite time consuming and will just as likely not change too much. This idea was born in response to the Mob attack on WGC, another 24 or 48 hours or being able to recruit other players, etc wouldn't have changed the result, we didn't even use a quarter of what we had built.
That being said, I do understand the need in general for more time to prepare/negotiate on the defender side. This can be accomplished much more simply by giving the defender more time, straight up, option for an additional 4 game months just by logging in and clicking the 'Additional 4 game months' button. I'd prefer to see it coupled with an option for the defender to start the war immediately, giving the defender the option for 'surprise' but even without that, I think the above option would suffice.
Ultimately, the problem with this or without this remains the same, people don't understand the war engine as much as they should or as much as they used to. The more cumbersome you make the war engine/declaring process the more you enable the strong war players because they are the people who will take the time to figure out whatever changes are made. Econ players/big feds like WGC will continue on either naively assuming they are safe without war protection or assuming they are safe because they are the biggest fed in the game, however, ultimately no one is safe and the only way to increase safety is to learn how to defend yourself. War protection and large feds whose most powerful members can't protect themselves much less their newest members are only making the problem worse. There are multiple facets to this game and simply saying 'I want to play this way' is not a good enough reason to completely ignore one of the biggest facets, 50% of the econ in the game is based on war and weapons, ignorance isn't bliss, it's just ignorance.
War protection has allowed the community as a whole to become completely ignorant to the war engine in general. The answer isn't to get rid of war protection but there should be limits on it and players should have to learn that side of the game or align themselves with players who can actually assist in their defense.
Don't get me wrong, I like the general idea here, being on a 16 hour (LU) or 32 hour (WG) time schedule to start a big war is a bit ridiculous and I think correction is in order. However, the ultimate problem should be addressed immediately, the war game is dieing due to war protection and exclusive c3 warfare, the war game is either going to basically go away completely or be revived by changes to correct the imbalance, I'm hoping for the latter but expecting the former. If the former does occur, you can count out 10 of the most active players in the game.