I think you can just update to SP14 regardless of earlier version of SP. The SP14 was release recently so you may have to wait for +ve / -ve feedback.
1. First you have to check any bugs are there in the running version of SP, and then if that is fixed in the new SP you can install it. 2. As stated by George M. Menegakis it is better to wait for some positive response
3. Please read the release notes of SP14 before updating it in your system.