We are working on porting Feeds to Drupal 8 today at the Global Sprints weekend in Amsterdam. We would like to know from you how you use these and similar import/export modules and what functionality you like but still miss in Drupal 8.
Please take the survey here:
https://docs.google.com/forms/d/e/1FAIpQLSe9zjZGM7chX3lSZAxnySygClCIlWrj...
We will use the results of this survey to prototype and plan import/export functionality for Drupal 8.
We did not decide yet if this will be done in the Feeds module or if we take a different approach.
The Feeds issue here: https://www.drupal.org/node/2847682#comment-11897066
Update March 21 2017
Survey is closed now. We have more that 250 respondents! You can download the raw results here https://www.drupal.org/node/2847682#comment-11997510