You want to have exchange fees, BTC TX fees and more variables - well I want to see at least something that will pay for the servers in the donations addresses, but they are all still at 0. You can keep using the free service that the site provides, ask for improvements, point out wrong calculations, etc. but in the end it's a free service.
The main goal of the site is to help people discover new coins and where the profits are. So much people have discovered the new NeoScrypts, Lyra2z, Lyra2v2 and so on coins that otherwise no one was going to see on the WTM or other sites.
I will continue to add new coins and try to expose as much new coins as possible to the users.