This scoring makes players like Dunn more valuable than he would be in a 5X5 since the HR scores big, there is no AVG, and BB score points so don't write him off right away. As I see it:
Hernandez: + young & awesome, - a pitcher (don't like to keep them) Adam Dunn: + consistent & reliable, - no upside & outfielder (lots of good ones) Justin Upton: + young and big potential, - unproven & outfielder, possible injury risk
In a neutral scoring set-up, I'd choose Upton here without a doubt. Given this scoring setup, however, it would be hard not to keep Felix if he really did outscore Dunn by 100 points and Upton by 160+ points. So, Felix for this league's scoring.
I'd keep Felix with those settings but really, letting go of J-Up in a keeper is absurd to me, you can't have like Pujols, Braun, Kemp, and Hanley for the other 4 keepers, right?