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source | link

I would only change the value of the UpVote to only +2 when the Question/Answer is below zero.

Examples:

-------------------------------------------------------------------
| Downvotes  |  Upvotes  | Rep (New system)  |  Rep (Today system) |
-------------------------------------------------------------------
     3             2            -2                 14
     1             3            20                 28
     4             4             0                 32

This way the poster do not gain any rep unless there are more people thinking that the post is right than the people who think is wrong.