I also drove the ram and agree with your assessment of the drivetrain. The 8 speed really wakes up the hemi with great throttle response under 60mph. On the highway the hemi was not as strong as I would like. The extra hp of the new 6.2 should make a big difference I just hope the 6 speed gm slush box won't limit the system. I am hopeful the new rear end bodes well for no torque management. I didn't notice the entry issue with the door but wasn't really paying attention.The 6.2L is night and day better then the 5.3L in the current trucks. I would agree the less nanny restricted Toyo, Ram, and Ford's with top tier motors all feel considerably more responcive then the GM. I love my GM 6.2L, best sounding engine on the market. IMO. I really hope they turn down the Nanny's in the new truck, becuase I am willing speculate without any real doubt that the Gen5 6.2L will be the most powerfull half ton on the market at least on paper, I just pray it can put to use and that the power can be felt in real world applications.
I just drove a 8 sp Hemi 3.55 gear Ram crew 4x4 a couple weeks ago. I spent a little over an hour with it. I have to say that setup is impressive. It felt really strong, with instant throttle responce, I don't know if it would out perform my 6.2L Ford or not. I think it would be close.
The main thing I didn't like about the 13' Ram was the shorter front doors which put my sholder right in contact with the door post. I am concerned that GMs new longer rear door, short front door design,(likley similar to the Ram) may do the same thing. I also sat in a Ram regular cab RT and the longer front doors of the regular cab resolves that door post in sholder issue. Ford in 04 went from longer front doors to short front doors and longer rear doors, they must have receieved a some negative feedback from there short front door design, because they fixed it with longer front and rear doors in 2009. My sholder is not crammed into the door post of my F150 even with with seat all the way back.