Should I watch season 3?

As far as season 1 and 2 goes, it might be my favorite series of all time. It's exactly my cup of tea. Sci-fi, alien invasion, mystery, almost all humans dead, empty streets, survival, children dying not trying to please a mild hearted audience.

Maybe my absolute favorite thing about the series is that there is no simplified evil force just looking for vengence or power. The characters are all good/normal people with diffirent motives and values that cross each other. I think the end of season 2 was a perfect ending to a story. A series finale. It really made the circle complete but also left a sting of remaining mystery and excitement, but still an ending.

Will season 3 ruin it for me?