The 2018 GMC Acadia is a mid-size, family-hauling crossover that bucks the trend: it was recently downsized. The 2018 Acadia lineup does almost everything well, even if it’s more of a B+ student than an A-standout. We’ve rated it 7.0 out of 10, accordingly. (Read more about how we rate cars.) One thing that’s important to note is...