What it should have- Manual seats with GREAT lumbar support, door pockets, manual mirrors(Gasp!), fold down rear seats, Model S's video display(hey- if the software is already done, toss it in!), cheaper steering wheel than a Mercedes, easier to pull apart to do body repair, conventional handles, cruise control, single zone AC- maybe even manual AC.
What we don't have on the S that I want- a little Garmin-like "here's the speed limit on the road you're currently traveling on" sign on the primary display. Better viewing of full song title(scrolling), better nav mode- waypoints, trip storage with owner labeling(including doing it on the app, and sending to the car, if that's doable), scheduling time of start of charging, and a little "eyebrow" over the backup camera, so it works in the rain, and "Snow Mode" that leaves wipers, door handles, battery, etc., ready for a bad winter storm, and "Scheduled Wakeup"- where the car preheats the battery pack and defrosts the windows, etc., on a set time AND DATE (with a "repeat daily", "Repeat M-F" function).
What they should have but only as an option? A HUD! (Heads up Display for speed, not too much more). Air ride suspension, tow package(including a prewired wiring harness for trailer lights), Lane Change Alert, AWD, Mini-SUV or Mini-Crossover body with adjustable height that you can keep for deep snow, rear window wipers, front side window/mirror defrost, Supercharger, enhanced controls on Valet/Teenager mode (Sliders for speed and power available to them), more of a description on the song titles, Roof Rack System for the Kayaker, biker, skiers in all of us(team with Thule or such?), and a Dog Option- Cordura seats, claw resistant door panels, dog friendly (can't stand on them) window switches. Remote power and location for a radar detector or EZPass, and a "Sport Package"- a cooler grille, slightly faster acceleration, bigger/better fog lights, rear Euro Style very low mounted brake light for fog, a slightly more aggressive nose piece, different wheels, blackout or body color options, spoiler, different rear valence, and maybe something else the SEMA crowds are doing now to their cars. Finally, a "Home Emergency Power" plug and cable to power your home in an emergency.