I will be quit honest with you:
Your server is too expensive - people cannot test characters and equipment on your heavily modified server and with regards to crafting items & donations (I have never seen such expensive donations on any server - yeah now I will hear you people should not that should not this - look at your server population ok?)
No Dual box - I made this suggestion before I make it again - you gave xyz reason your decision (i know what kind of person you are for thinking like this) - people cannot test bufss, trade (cough people with 2 pc's have unfair advantage but you dont care - donations it is - I may have been best donator on your server and tbh I have never donated that much on any server before (I have to hold myself not to curse).
There are lots of other things, but let me tell you - people arent dumb.
They came to play high rate server and seeing such a huge drop from 450 to 150 in just 2 weeks.. your server isnt appealing, doesnt have it.