I'm not sure if anything has been reported on these yet but...look for extra thickness on obverse letters and date, especially at "Liberty" and extra thickness on reverse designers initials to start with. You would be looking at this for doubled dies. You can use examples of the 2014 P & 2015 P doubled dies for reference points by looking them up at www.doubleddie.com.
Hello and welcome to CT. Here is a reference you might want to check out! http://www.lincolncentresource.com/index.html
There are a couple of varieties listed on Wexler's site, but there's really only one that's truly meaningful. The WDDO-001 has decent spread on Liberty. I found one in my last box.
But keep in mind you could always find other errors such as strike throughs, minor off-centers, broadstrikes, etc.