You could just have the SoFA post a thread with all the ballots cast in an anonymous form post-election, that would eliminate both problems.
Though here's the fundamental issue Colin brings up and it's an important one to think about.
If all ballots are secret and no one knows the results, pretty much nothing will happen election weekend except for behind the scenes angling and maybe some speeches. COuld this make the pre-election time more interesting? Maybe, but I wouldn't bet on it. Just a couple of thoughts.
I think it would make pre-election time more interesting, and I think it would also require the position of SOFA to be separate from that of someone who runs/participates/votes in the fantasy elections.
tactical voting is a bigger problem than keeping it anonymous