Don't you think that sharing the community reward proportionally to token balance could deincentivate people with fewer tokens to perform evaluations if they see a "whale" who holds a huge amount of token already submitted his evaluation? If this happens, the number of assessments could be to low thus damaging the results statistics
even if it happen the weight of token amount not so significant and the model should keep the interest to assess precisely. moreover, this model works on Wings Platform now for a quite long period and there is no such effect - all the community is willing to participate.