I'll check it out, and believe me there will be news soon! 
Wouldn't downloading images directly from an URL cause you more copyright problems? You won't be able to claim a user uploaded it.Not exactly. Because the upload system is exactly the same, whether using a file on your computer/mobile phone or using a link.
All parameters remain, following the same system as currently.
No. The method of upload has no bearing whatsoever on copyrights. What is important is that the owner of any copyrighted material has a way to remove it with a DMCA request.
I actually have to improve my information on this. Thanks for remember.