I skipped most of it. My position: keep it as it is (4 guilds, DoE, KoJ, 4SRS & Behe)+ random guilds fighting for 3 castles is just fine.
Either way, 1 castle = kill the server/Too many castles = kill the server:
1 Castle: The top guild will rape everyone and people will start to loose interest and leave the WoE scene.
20 Castles: Kills the economy of the server. Too many castle loots, no fights at all (People will just make 20 SinX per guild, turtle until final minute and emp break fest in the final 30 secs); [No zeny spent during WoE due to no fight]. This, again, is not fun.
2-3 castles: Good fights, keep the economy running, allow lower guilds to have hope on getting a castle.
These are my 2 cents, didn't read previous posts... maybe I am just repeating.