Its pretty basic now-a-days, but heated seats/steering wheel should be in the list, IMO. My wife will never allow us to get another vehicle without it.
A ton of the features are nice-to-haves, but wouldn't be "deal breakers" for me.
And just my grammar nazi alter ego... it should be "Trailer Brake Control" not "break".
I also wish they had 6.4 bed with Rambox.
I wish they would too. If they had, I would have got the longer bed.
My guess is once the 2500s/3500s start using the newer Rambox style, and they start offering it on their 6.4' foot beds, they will also offer it on the 1500s. Thats how it happened on the 4th gens, if memory serves.