The Hemi engines as a whole seem to not get nearly the benefit the Pentastar gets. Note that the 5.7 equipped Ram sees a pretty meager jump. Norm pointed out the the nature of the V6 makes a more logical pairing the 8 spd, this likely helps explain the delay of the 8 spd in the LXs. I suspect it will still be an improvement in every day driving. I kind of suspect that MDS could be revised to better leverage the 8 spd, accounting for more favorable gearing and what not. But, alas, the Hemi equipped vehicles are much less in the spot light these days.
As for the Compass / Patriot, not surprised.
As for the Compass / Patriot, not surprised.