Update #2: Lightroom 6.3/CC 2015.3 is now available which includes the previous import functionality, bug fixes and added camera/lens profile support.
Update: We plan to restore the old import experience in our next update. In the meantime, if you need to restore previous import functionality, or are experiencing other issues with Lightroom 2015.2.x/6.2.x, we recommend you roll back to the Lightroom 2015.1.1/6.1.1 update until things are reverted and corrected. See instructions here: https://helpx.adobe.com/lightroom/kb/roll-back-to-prior-update.html
Lightroom CC 2015.2.1 and Lightroom 6.2.1 are now available through the Help-> Check for Updates menu item inside Lightroom.
This update provides a performance fix related to Import and also fixes crashing bugs identifying in the Lightroom CC 2015.2 / Lightroom 6.2 release.
Please select Help > Updates to use the update mechanism in the Creative Cloud app.