That's not how it works. The sporting value ranking doesn't take into account the actual WT points but instead you get a score for which place you finish in the WT and other rankings plus you also get certain bonus points for any win.
CQranking has a provisional list that you can see here:
http://t.co/H1pzNjq
(This was before Eneco Tour I believe so the points have shifted slightly)
Gerrans is listed at 20 points in that ranking and Plouay moved him up so right now he is worth 40 points.
Still, CQ lists them at 12th with a team that includes both Goss and Henderson and if neither of them join GE they would lose 199 points of that score (counting in the increase for Gerrans) which would move them down to around 23rd spot which is outside the top 20 that is needed to even be considered and well outside the top 15 that is needed to be sure.