It appears the Cubs are leaving St. Louis tonight at 6:30pm, or at least their flight number has a scheduled departure for that time. If this is the case, it appears the entire series will be postponed. Perhaps there is another reason why this flight would be leaving, though. Nothing has been confirmed as of yet, this is just purely speculation.
One thing that strikes me about Jason Heyward's swing is the intensity. By watching his feet, you can get a sense of the force with which he is rotating. That's what it looks like when you take a swing to "11".
The interesting thing is that Heyward's swing isn't unusually short. It's 10 frames, which is typical.
As a result, of the violence of his rotation. Heyward gets pronounced extension, but his extension is the result of the force of his rotation, not the cause of anything.
The biggest negative that I see is a lack of a Z-Axis adjustment mechanism. Like Matt Holliday and Matt Adams, and unlike Albert Pujols, Jason Heyward has no way of delaying the start of his swing other than keeping his hands back. Notice how his hands don't launch until a couple of frames after his front heel plants. That (kind of) works, but it's not as efficient as what Pujols does (or, really, did) or Edmonds did.