I have the V8 not the V6, but mine also slows down when I take my foot off the gas, I wouldn't say it's very dramatic, but more so than my work van or my Suburban.
The proper term is called "engine braking" all vehicles do this if in gear but not all are the same, so it not truly "coasting".
If you want to check and see if it is indeed just engine braking or some other issue causing it to slow down more rapidly than it should just shift into neutral and see if there's a difference, if it still slows down more than you think it should when truly coasting in neutral then start checking brakes pads dragging, parking brake adjusted too tight, bad bearings etc.