Drew is cold because he hasn't played yet. How can he get red-hot without getting playing time? I hope you understand the issue there, otherwise any girlfriends of yours are going to be incredibly disappointed.
Iglesias is batting .529 after six games. He has barely hit anything for actual power. Lots of guys start out the season hitting over .500 and sink below .250 after the first two weeks. I wouldn't bet much of my limited income on Iglesias not being one of them.
The fact is, Drew was acquired to play every day, or almost every day. Unless he gives Farrell a reason, other than not having played yet, to not play him, he's going to be the everyday player, not Iglesias. It may be tough to hear for all of the people who pronounced him both the second coming of Jesus and the second coming of Ted Williams, but that's how it is.