I have few suggestions to enhace Castle mechanics and turn players even more insterested on it.
1- Unique equipment with special bonuses that only guild with castle can produce/use. This special bonus only works if the guild have a castle, it's dynamic, not permanent.
2- Exclusive NEW dungeon (shared) for all guilds who has castle. Like coliseum but requirement would be: Have a castle.
3-Alliance System. Make possible a limited number of Alliance with other guilds including elfs and MCs alliances allowed.
In the alliance nobody from respective guilds can kill each other during Castle Sieges.
4- Place the vendor NPC outside the Castle instead of inside, that will turn easier for people to buy stuff. Ex: Boss Rottung Ayr is on the castle and no one appears to kill it. Result: weak players can't get to the Castle Shop.
5- During Castle Siege (inside the castle) after guard killing, make warp with random player placement on attack, it feels too predictable as it is right now. Even with the various entering gates there are displaced, the possibilities are pretty limited.
6- Guild chat block button that only affects guild Newbies and Explorers.
I really think these are reasonable requests to improve this face of the game. I know some of them needs some work, but at least number 4, 5 and 6 seems easier to solve!
Thank you for your time!