I agree that taking a vote for the top 2 when there were 2 such obvious frontrunners was a bit redundant.
NeXus has a lot of experience running LANs and I think a lot of people underestimate how long tournaments run at LAN parties, especially ones of this scale. With the tournaments running back-to-back and not concurrently, I can see 4 tourneys being a comfortable number for them to do. While it would probably be possible to do 5, with 3 tourneys on day 1, I think they just wanted to avoid some of the stress of running a tighter schedule.
However, Renegade has mentioned
here that unofficial tournaments are welcome and encouraged, so if anyone would like to take it upon themselves to host a Hearthstone or other game tournament, NeXus will accomodate however they can.
Personally I think it would have been nice to see Hearthstone make the cut to break up the FPS monotony, but I understand there are a lot of FPS fans at these LANs.