I think that turbos are meant (or at least portrayed as) to replace the NA V6 engines. And when compared to V6s, the gains are very minor in both the fuel economy and capabilities.
Maybe you're right that turbos provide a better capabilities in the smaller Crossovers but how much of those additional capabilities "regular" drivers use on a day to day basis?
So I like the current Mazda set up of having the option of both engines unlike other manufacturers who have completely switched to turbos. One of the reasons I bought the CX5.
Mine replaced my 4 NA cylinder. Much better mpg. Also, yes, I use the capabilities often that my 4 cylinder NA motor kept me from realizing the advantages of.