@smooth the problem that voting on comments dilutes your voting power can be solved through using Segregated voting power for each category per user.  

Generally i love the idea of having segregated reward funds. Because this could evolve to a kind of virtual nation / federation.  
Which categories are used and their percentage of the the reward funds should not be set in stone. Instead users should be able to vote on it. For example a change would need 2/3 positive votes over a period of 1 month. 

The number of changes per time period should also be limited to avoid change suggestion spamming. For example each month only the top voted 5 changes with 2/3 positive votes are taken. This number itself could be voted on the same way. 

The same way voting could also be done on the curation percentage in an category. So @smooth could vote for a smooth comment curation payout :)