There is a new v1.13.1 snapshot release here:
It is better able to handle large delimited files. In testing we were able to load a 1.6 GB CSV files with 20 millions rows and 10 columns.
It also has a new option in the Sample transform to sample randomly.
And there is a fix for a bug in the Slice transform.
It made available for customers to give feedback on. It has not been tested as heavily as a production release, but it should be fairly stable. Please reply to this thread if you have any feedback.