You're right I'm not looking at the lack of extension very much. With the Dbacks recent trade it appears that the Cubs are going to wait on Samardijza for a long time. Decent starters are being had around the league. I also don't see how they're going to get ML ready arms but instead an impact position player and some fliers.
Just a thought but trading to the Phillies could work out if the Cubs want to take on some salary. Rumors of Dom Brown being packaged with Papelbon. Add in Jesse Biddle and they are actually looking like a trade partner.