Further information about the new survey module in core is becoming available from its developers (Moodle partners in Italy). See here for the announcement in the Future major features forum https://moodle.org/mod/forum/discuss.php?d=215159&parent=937069
I have given the alpha version a quick kickabout and fed back comments to the developers already. I will share my comments publicly on the forum thread above and in my blog (should any-one be interested!!).
One area where questionnaire users input is particularly requested is in writing a migration script to allow us to swap to Survey2 for specific instances if we choose to.