My 50 cents on the Topic.
Would be really cool if you could implement a way to reduce guild castle buffs to 6kk for all 3 ( I wont write again the reason as it is written 100x before here.)
My Idea would be a New Building for Guild Castle : Factory.
Reduces Guild Tower Cost based on Factory´s Level.
Level 10 reduces Guild Tower cost by 33% ( Values are just to represent my Idea can/should be changed obviously)
Level 9 reduces Guild Tower cost by 25%
and so on .
Factory can be upgraded with Guild Materials , or Arcadia Coins ? so everyone in the guild can participate with running instances together.
Also looking at current AH Gold sales where are ~ 1kkk Gold at auction right now , is way way too less to fund even a fraction of Servers Gold needs, when looking at Engineering or Card System especially.
Would be cool that if you keep gold like it is now that you add other ways to get / farm Gold for players to sell or use on their own. ( Gold drop from monsters directly ?)
Edit: Also maybe an option to look into would be to make it more attractive for real newcomers -> Minigames ? Gold Bags that contain a small amount of Gold sold for Shells for example? , as to be somewhat half efficient to farm gold in instances you need some Diamonds Start capital ( perfume, travelling merchant maybe 1-2 extra bag slots and some basic ,not starter, gear)
I dont really want to farm Gold everyday just so i can run instances for that day and having to redo it all over again the next Day.
Greetings