All-season tire performance?

I just bought a new set of all-weather Federals, after finally getting around to replacing the originals at 59K. My 2001 Insight seems to be working harder & mileage doesn't seem as good. I'm happy with my 61 LMPG & want to keep that or improve. Is this performance typical of all-weather tires? What's the best bet on new tires? I've seen a number of posts recommending Sumitomos. NOTE: Just had a 60K maintenance check-up & wonder if there might be issues related to what service techs might have done or not done.