you would really prefer username/password login? I just hate that system. the current system is so elegant. I was thinking of emailing a code- which you type it, to help with people on different devices.
The question is, will you implement a system based on your preferences or based on player's preferences? As we all know the username with password system is the most used one in most all casinos which means most players are familiar with this system already. Having different account system is unique but I think you should also add the most used system too.