I have to say, the first time I used the new comping my head exploded because although some people didn't like take lanes, I had a workflow that worked for me. In fact there are
several comping workflows that work with X3, some of which are better than others. But when I looked at the Speed Comping help, bingo!! That's definitely the preferred method. Once I became familiar with speed comping, AFAIC that's the way to go.
I strongly suggest that if you're into comping, check out the online help for Speed Comping and go through it step-by-step. I didn't really "get" it until I followed the instructions while using it on a project.