I'll grant you, Mercs is definitely the better game (and yes, I've kicked Nondi's ass at least twice), but there is something about these "globetrotting around the Inner Sphere getting into trouble with multiple factions" that doesn't grab me as much as a good, hard campaign of conquest over multiple continents on a single planet. Just personal taste, really.
It's one of the reasons why I wasn't all that invested in the story for BT2016. I know everybody is cuckoo for running their own mercenary units in MW games, but I'd like to play through more campaigns that go from hot-drop beachhead to stomping around the enemy capital.