I have a project that exports a perfectly valid MMPK in 1.4.1, but when I open the project in 2.0 and recreate the MMPK, the result is a piece of crap (when reimported into Pro). I've attached it to see if anyone else can recreate the problem.
Thanks for reporting this issue and providing the sample dataset. This issue has been fixed for the upcoming 2.0.1 patch for ArcGIS Pro which is scheduled to be released in mid August.
Looks good, thanks!
Retrieving data ...