If I get it correctly:
The DV Power Pool is filled with free -100% Votes.
When the DV Power drops below 0% than your Voting Power starts to decrease. (Like with normal positive Votes).

The DV Value is always the same as the actual Upvote Value. (With and w/o a filled DV Pool.)
You can use your "Upvote"-Power to downvote like it was from the beginning.

So you have the same DV Value with a 0% DV-Pool than with a 100% filled DV-Pool.
In this example +/- 1.568 $ (with a 100% Up-/Downvote)


@ all
Did I get it right?