I also have the ridiculous upvote value problem, but slowly sorting it out :)

From what I've understood, Steempower is they key for a more powerful vote. Converting SBD into Steem, then powerup it will raise your upvote value)

This is also influenced on a daily basis by your voting power (which is reduced everytime you upvote, and then is regenerated slowly overtime)

You can check here for your details :)