Lots of luck with the new Ram.
Odors? Cloth seats you can get a good detailing place to do the carpets, headliner, and seats and thay should be able to get smell out. Ask them if they will guarantee the smell removal, not a smell cover up.
As far as mods, I feel that the best mod for improved MPGs would be a Non Restrictive exhaust/muffler. A good muffler that is not meant for noise as much as lowering backpressure is good.
Cold Air intakes in my opinion do not really improve mileage more than 1 mpg as a design. They will increase noise levels in the cab though.
Chips/programmers? They are really meant to improve performance rather than MPGS.
These are just my opinions.
If there is a way to raise MPGS on a 4.7, I would love to hear them. I do not want noise, drone, etc. You can message me rather than tie up this thread with non topic stuff, like 1/2 of mine was. Sorry.
Again good luck
RAM 1500 SLT QC 2009 INFERNO RED, ARE Lift Lid ,Spray on Bed Liner, K&N Drop In, Pioneer DEH P8400UB, Alpine Amp, Mopar Kicker sets in all doors and dash, 2 Polk 10" Subs, Polk AMP, SteelCraft Nerf Bars, Mopar Fog Lights, CalTrend Seat Covers, WeatherTech Front Mats, Putco SS Fender Liners, SuperBumper SS Hitch Step/Impact Absorber, Onki Aegis SS Center Guard, PIAA 2100 driving lights