Although the midiclorians aren't popular, they did explain a lot. They weren't the force. The force is still the mysterious "Force" it always had been. Many just misinterpreted what Lucas was doing. What he was doing was explaining why certain beings were stronger with the force than others. For instance, why was Luke able to use the force, but not Han? It wasn't training. How did it run in the family? Midiclorians are genetic, according to Lucas. The Force was attracted to them. Those with more midiclorians were stronger. It actually was a necessary explanation, so they could explain why the Jedi would seek out certain younglings, instead of just anyone. Anakin was conceived by the Force and had one of the highest counts, since Yoda. That's why he was so feared by the Jedi or seen as the chosen one. I'm glad Lucas brought them up. Not just anyone out there could use the Force. They needed to have a certain count.