My Compass isn't a Trailhawk, but I've also got the 9 speed in my '18 Latitude. In my opinion, it has pretty good acceleration for what it is. Actually far better than I had expected after reading reviews (by corporate America, of course). I'm a little over 1000 miles into ownership, and now that I'm adjusting my driving to the way the Jeep is set up, I'm really happy with it overall. My last car was a 2013 Chrysler 200 "S", also 2.4 powered but with the 6 speed auto. This little Jeep would beat the tar out of it a in the quarter mile, no question.
I've come to realize something is a little squirrelly with the reviews we see... Look at reviews by ACTUAL OWNERS, it's little they're talking about a completely different vehicle!