Is there a way to increase the speed of the "hover open folder" thing when drag and dropping?
Not strictly a duplicate of Spring loaded folder settings missing in Yosemite however the answer is the same, so I'll save future Googlers some effort by copying it, with slight modification, to here.


  Spring-Loaded Folders
  
  
  The slider is located in System Preferences → Accessibility → Mouse &amp; Trackpad
  
  
  You can change the spring-loaded delay by writing the setting manually:

defaults write -g com.apple.springing.delay -float 1.0 &amp;&amp; killall -HUP Finder

  
  Replace 1.0 with the delay in seconds before springing.
  


Credit to grgarside