I'm not sure about the cntl-click. A Google shows a bunch of different options that may work but can't check them out today. But for scrolling you might try the advice here:
http://linuxg.net/enable-horizontal-and-natural-scrolling-in...
It looks like the GUI shows options for both devices, but the settings are split between trackpad and device. So it may do what you want.
I attempted Linux on a Chromebook Pixel and it was miserable, which is why I had shied away from the Retina. :-)
The install was easy enough. Setting up refit was pretty easy. The only slightly complicated issue was putting the wifi and other proprietary drivers on a thumb drive because the rMBP doesn't have an ethernet port.
My only gripe with this setup is, because I run it about 60% OSX/40% Ubuntu, is that I'm really only happy in Ubuntu when I have a USB mouse plugged in. I haven't figured out how to make ctrl-click equal right click and I'm one of those who likes to two finger scroll inverted (like an iPad), but use the scroll wheel on a mouse in the traditional direction. If anyone has figured out a magic solution to MBP trackpads in Linux, I'd love to hear it.