The solution to this problem is simple. Remember when MOD was considered one of the hardest forts to take? What changed? The admins instituted a death penalty for the holding guild. A few months ago, if the holding guild died in MOD, they would be warped to the roof. Now, they are warped inside and have to walk a bit and fight through the staircase to get back to the roof to defend the flag. This simple change transformed MOD from an impossible tower to the easiest tower to take on Classic.
Snow is now the next easiest to take. Why? Because there is a slight death penalty, although not as extreme as MOD. If you die in snow, you are put all the way at the top of the flag room. An attacking guild can easily block out the holding guild from going straight down to heal the flag.
Now, look at Castle. There is absolutely no penalty for death. The holding guild dies and respawns in the same spot that they died in. This is what makes taking castle so hard---there is no death penalty for the holding guild, but the attacking guild must travel a long distance to get back to the flag. If you were to simply move the respawn point into the hallway, or even a random corner of the room, this tower would become less difficult.
Look at Deadwood. When the attacking guild dies, they have to travel a long distance. When the holding guild dies, they are warped out into the hallway that is right next to the door leading to the flag room. Why not warp them into one of the middle floors of DW?
Same issue with Swamp and Sards, which are like the old MOD. If you die, you can just immediately start to block again.
By simply tweaking the death respawn points for the holding guild, you can fix a lot of these issues and give other guilds a fighting chance of actually taking a tower. It would make the game a lot more fun. And quite frankly, it may turn out that CJ, NAL, Cruxis, and COM are actually the best fort holders and could hold the fort even with these proposed changes. But at least it would give new guilds more of a chance and lead to an overall satisfaction with the game from guild leaders.