For the sake of the organisers, I'd be happy to leave the details a mystery.
It could be the opposite. If you see how the score is calculated, there might be less questions how this could win. Like some Olympic Game rating, where you even see how the individual judges vote, all open and transparent. And the judges might take more care to look at the projects, so that there could be less criticism for the individual categories as well. And if it turns out that a project can win, even if innovation has a zero rating (otherwise the winning project looks good, all documented, open source, well executed, good video etc.), it might even lead to better weightings or additional rules (wasn't there a rule that you can't submit a project which you submitted for the previous HaD contest, without major changes?). I think it would help current and future contestants to see in which categories they can do better, which will result in better entries. But I agree, would be more stressful for the judges. So just publishing the individual votes per category per judge, but without the judge names, might be a good compromise.