12k is pushing all the spec limits for a regular 1/2 ton platform or 9k for a TT no matter the Mfgr. And that’s with proper weight distribution and proper motor & gearing etc.
I think the take rate should be something like 70 percent Hemi 20 percent Pentastar 10 percent Ecodiesel depending on how the truck is to be used. It’s weird how many people are defensive like a new motor is to replace their old favorite when that’s never been the objective. Pick the best motor to fit your needs & objectives variety & choice fits more needs and sells more Rams. Ram dropped the pointless 4.7 and added the diesel to keep 3. Chevy will have 4 with the small diesel Ford 5 with their small diesel.