Castle changes
 

A few improvements should be made to the castles:

Gates
Gates should be open-able by kingdom members, so multiple allies can pass trough. It should also be destroyable by siege weapons, so it'll be possible to take over a castle.

Ports
Ports should be little doors in the wall trough which kingdom allies/members can pass trough every minute. It can be taken over by an enemy, but will not be a terrible threat since someone can only pass trough every minute.

Kingdom inside
It should be possible for anyone to acces the inside of a castle, so the war can be continued there. It's pretty dumb you can't get in there now.

I think that there may have been a fairly interesting castle system way back when...the four lion statues and crystals for the God's altars where involved...I was lucky enough to play around with it once, and if you touched the crystal, it changed colors...one color opened the gates for everyone, one made the towers fire arrows, I think.....

I want to jump the gate :P

We have Zeppelins for that.

a new spell called teleport to kingdom to teleport to your kingdom.

Zepellins stink, they're not nearly fast enough to be -any- use, or fun.