The imbalance towards vote bots is actually higher then you can report due to the fact that regular users sometimes sit at 100% voting power for hours or even day or they votes down to 80%. Either way they are not casting their votes in the absolute most efficient manner like vote bots do.

This means that the weight of the SP held in Vote Bots is used in a way that they are capturing even more of the total reward pool then an equal amount of SP held by real people.