I just updated to 1607 and that changed everything. One of the things I tried to do was remove the welcome screen. All that ended up doing was removing the background picture, and replacing it with a solid color.

Click image for larger version. 

Name:	9affe345%2d17e4%2d4864%2da0aa%2d1a284931cbf0.jpg 
Views:	2 
Size:	152.5 KB 
ID:	114920
This is what it used to look like. I use auto login, no password, so this screen shows up after restarting before the desktop.

If it's possible to skip this screen completely, that's fine too. The current solid color background is kind of annoying. If it's not possible to skip completely, I would prefer the default image above.