Gotta chime in on this thread to say I've been very pleasantly surprised so far by the 3.6+6MT combination on my '24 JTM (4.10). It's great fun to drive!
Confirming what other folks have already said:
The clutch pedal is really light (lighter than my BMW E92).
Pentastar definitely likes to rev more than the AMC 4.0.
Really glad I got the manual (wouldn't have considered an auto on the JT until the '25 PHEV, either).