Damage Formula

I have been playing in this server for more than 7 months now and I can easily say that there are huge imbalances between classes, from both pve and pvp aspects. I thought it will get better with updates, especially with succession update, but the problem remains unsolved. Some of my friends went back to retail, telling damage formula in GameZ is faulty. I did some research on it in this forum but failed to find any useful/up-to-date information. Could you please give us more information on this? Maybe provide some basic graphs or test results etc. because I know that you have a unique formula that resembles the one used on retail.