i'm another in the corolla boat. they got better looking, reliability was still there and efficiency was still pretty good.
the mazda line seems to be more for the "drivers" out there and dynamic driving wasn't a criteria you mentioned, so not sure if that's a big selling feature.
overall, for the things you mentioned as hot buttons, the 2's size might make the fuel better, but physics will say the safety will be a little less than a similarly equipped larger car. bit of a wash.
lots of good cars out there, most will check the needs columns you have. find which one covers the wants and off you go!