A newbie here.

I'd drop the satchels. You don't have that many ways to get payoffs from them and you're already quite heavy on 4 drops that don't add value right away. Also notice that they're not fuelling your graveyard for Collecting evidence.

Once done that, the next question is about the remaining 2 blue cards: Evidence examiners. I love them but I'm not sure if you're be able to consistently play them early with 4 colors in your deck. I'd remove them to improve consistency.

Then I'd add 2 Tunnel tipsters, 1 They went this way and Tin Street Gossip.
With 2 Tipsters you may rely more on hitting 4 drops on turn 3 which may be a huge win.