"vs not having MCAS at all"
It's possible that the FAA won't let Boeing do that, short of re-designing the MAX's aerodynamics to make it inherently stable. Boeing, of course, will be pushing for a simpler software and training fix at this point. No third AoA sensor and related FC computer and certainly no changes to aerodynamic surfaces, engine cowlings, etc. The problem with the current design, to use an automobile analogy, is that it handles (in pitch) like a car with bald tires and bad front end alignment without the automated correction system (MCAS). And the FAA might not accept such a bad stability situation, even with pilot training. I'd like to be a fly on the wall in the Boeing/FAA discussions on this topic.