Using springs for a mouse button is interesting. I look forward to seeing how the enthusiast community will view this mice and how it stacks up to Omron switches.
Also I thought MOBA's had a decent number of actions to perform so some people would like more buttons on their mouse? This one seems very geared towards the fps genre as the six buttons entails the left and right mouse buttons, scroll wheel, DPI switcher and two programmable side buttons. Very basic layout for a MOBA styled mouse. I haven't played dota in a while but I remember being very fond of the Razer Naga's side buttons while playing; especially for interacting with the courier and performing special attacks.