You can Download the PDF here, and it really is a must read for pros.
It goes in Depth on Hardware and settings, workflows with Dailies, Proxy workflows, working with Productions, Mutli-Camera editing, dynamic link with after effects, turnovers, remote & cloud workflows, panels and integrations, and resources & tutorials.
And right on the first stage of text it tells you why not to use Merged clips (though it doesn’t tell about the exporting XML workaround to fix it, and honestly would rather have Adobe remove the feature if they are going to say this, though really I would rather have them FIX IT).
This guide is a must read for all editors working in Premiere Pro. I love that Adobe has done this.