I'd make the argument that informed voters already have more sway, because informed voters are more likely to influence others.
Really? The internet is a mess of misinformation and propaganda. Have you read comments on political articles? Or worse, YouTube? You don't have to be informed to influence others. You just have to be loud.
As what has been said already, its not hard just look up their political views and study them for a few hours before you go. And people that do that will already know who they are voting for, their just reading it to pass a little quiz, they don't actually care. It isn't going to change much of anything, it will probably make people vote less. And the people that still vote will only study the information so they can vote, not because they care or want to be informed.
I'll leave it there, don't want to get a warning. Hope no one is actually mad at each other. I'll just pretend this thread didn't happen

Sure, people will still vote for the candidate they like most. But those who are undecided (and this is really what the system should target) will be able to convince themselves through facts and information, and then they'll be able to take their newly informed decision to the polls for extra credit. Being informed might even swing some decided voters over to the other side, once they get past their party's propaganda and learn about the real policies behind their candidate.
There will always be uninformed voters. I said
that too. The point is to increase the number of informed voters and informed votes.