It is true that to make good decisions, we need facts. Gideon had all the facts, but still he hestitated. He delayed obeying God because he wanted even more proof.
Demanding extra signs was an indication of unbelief. Fear often makes us wait for more conformation when we should be taking action. Visible sign are unnecessary if they only confirm what we already know is true.
Today the greatest means of God's guidance is HIS Word, the Bible. Unlike Gideon, we have complete , revealed Word. If you want to have more of God's guidance, dont ask for signs, study the Bible.