I kind of see trading up or down as being something based off where you are as a team.
If you feel you are a contender, with a solid roster, you are more likely to trade up to get that final piece you believe could help you make that final step.
Likewise, if you are rebuilding, with a lot of holes in your roster to fill, you will tend to trade back in order to get more spots covered.
Obviously, personal likes influence the process, if a particular player is coveted it can change the metric, but by and large, it should be based on where you stand as a team.
And considering the number of holes we have,,,, yeah, trade down.
