I agree with you on the SysV part but I think that, at least at first, package management should be avoided. I think it's important for people to understand what's going on behind the package management, i.e. configuring and make-ing everything, make targets, etc. I started with Slackware too, and learned a great deal of knowledge that I wouldn't have if I had started with RedHat / Gentoo / Ubuntoo.
And yes, I realize that you can build your own from source on any of those, but with Slackware you're somewhat more forced to.