Yes, the 3-2-3 Edge pairing is so much faster and to be honest, I find it even easier than the normal edge pairing you usually learn first.
You know exactly where to search the edges, you don't have to care where to store and replace the solved edges...
Do you replace already solved edges before doing the first slice? I'm not sure what is faster?
I think in most tutorials they just leave them and have one edge less to replace before slicing back.
I think it's faster so save them but it breaks fluency.