I had this idea for the Hero Championship coming this year, and I decided to put it forth so that the one/s who is going to run the Championship might consider it.
When we build a deck we usually have to take into account a factor: the threat cost of the Hero. So why not make a championship that takes into account this factor as well?
I did a quick breakdown of the heroes currently available (including Dori) by their Threat cost, and got these numbers - barring any mistake of course:
5-8 Threat Cost: 20 Heroes
9-10 Threat cost: 25 Heroes
11-14 Threat Cost: 18 Heroes
Why not make 3 different branches of the championship pitting heroes with a similiar threat cost?
After a given number of rounds they could be mixed up, but I think having such separation at the beginning would really help in determing which ones the community thinks are the best (and even the partial results would be interesting).
For example, I think it's not easy to make a comparison between Merry (T) and Elrond: their relative strengths are too different to be compared, as is their cost. However comparing Merry (T) to Mirlonde makes a lot more sense IMO: even if, of course, each hero has its own peculiarities and decks he/she can fit in it's much easier to compare those supposed to occupy the same slot in a deck.
Furthermore, I think it would be very helpful if there was a way to keep into account the different player modes when voting: some Heroes are absolute beasts in a 3-4p game, but they suck solo, and vice versa for other heroes.
I understand this would be hard to implement, but I think it would be worth a try; at least it could help specifying whether one has to take into account all game modes and balance his judgment or just the one he thinks is the most important for the hero in question - this would help in having an evaluation of the heroes that is consistent in its criteria.