I love my new Leatherman Micra just as it is, but it would be great if there was another version that came with pliers.

SOG offers the CrossCut (scissors-based) and CrossGrip (pliers-based).

Why can't/doesn't Leatherman offer a pliers-based version of the Micra?

I know about the Juice lineup, but those seem a little small to me; smaller than the Micra.