I don't quite understand why the shift from 20% to 50% all I can see happening is an increase in the number of DTW messages I get because I now have to wait 30mins for someone to come out of pin instead of 10mins. If you want to stop people from self pinning then by all means don't allow either outgoing or incomming actions but why raise the point at which they open up again?
Something that isn't clear is does this 50% DTW rule apply to both troops and spies independantly, both at once, troops only or spies only?
For example:
If my troops are taken to 0% am I unable to perform any actions (including spy actions) until they regen to 50%?
If my spies are taken to 0% am I able to be attacked and attack others or am I out for half an hour until my spies regen?
Do you have to take both troops and spies on an oppenent to 0% before they DTW?
One thing is for sure... crystal sales won't be adversly effected
EDIT: Another oddity is that you say you want to have people focus everything on the war, this is the reason you remove the ability to quest. However, a player outside the war can pin you not only reducing your abity to make gold but also making you lose a percentage of your plunder total. It doesn't seem like this would encourage people to focus everything on the war and ignore the outside hitters.
I am also unable to see why you would make successful spy actions annonymous but if I am able to assassinate an opponent to zero troops you will send them a message telling them who it was.
MORE EDIT: I hope some of these weekly war events will be held during the week rather than at the weekend so that all have the oppertunity to take part. I noticed someone else saying that the start times should vairy and couldn't agree more.