Have a look at the list of new features we've posted to our Premiere Elements FAQ.
What's new in Premiere Elements 14?
You can see a detailed discussion of the new features as well as screenshots and tutorials if you follow the link.
Please take a look at my Premiere Elements 14 First Look Details and Premiere Elements 14 Daily Discoveries.
From the Adobe perspective
Sampling that caught my attention (refer to first 2 links above)...
1. Drastic changes sharing area going from Premiere Elements 13/13.1 Publish+Share to Premiere Elements 14 Expert & Share.
2. ISO Image file size issue of 13/13.1 appears to have been resolved.
3. Audio transition issue appears to have been resolved. If your interest is in muting audio, now there is a way to mute a whole audio track, and also there is a Master Meter to alter the sound of the entire project.
4. The Outdoor Adventure Instant Movie "Media Offline" displays in the finished Instant Movie are still there.
Please consider and then we can discuss in more detail if necessary.