Here are some very basic tuning options that just about every other sim has. I was shocked to see that PD left these out despite the fact that it is a demo. (especially 1, 2, and 5)
TUNING
01) Adjustable Bound and Rebound for Dampers
02) Adjustable Front and Real Anti-Roll Bars / Stabilizers
03) Adjustable Tire Pressure
04) Tire Heating / Tire Wear / Damage
05) Adjustable Limited Slip Differentials (God I miss this option!!!!)
06) Pit stops / Adjustable Fuel Level for long races
Tire wear will separate the men from the boys when it comes to tuning and driving skills. Running an overly-aggressive setup or pushing too hard will ruin a set of tires well before a race can be completed. Hopefully, this would also help diminish the amount of the overly-aggressive drivers...but not likely.
DAMAGE
07) Suspension / Aerodynamic / Tire Damage (at the very least)
08) Radiator / Clutch / Engine Damage (Rammers can puncture their radiator...like in other sims. 👍)
MISC.
09) Fix Rubber-band Effect
10) Fix Penalty System
11) Fix difference in Hot-Lap TT/Arcade WR times between NTSC and PAL versions
12) Eliminate Wall Riding and similar glitches
13) Private Servers!!!
14) Longer races...3-5 lap races are a joke!!!
15) More Tune Saves...3 saves (A, B, and C) are not enough when they constantly remove and change the online events.
16) Adjustable Axis for Clutch, Accelerator, and Brake Pedals...especially the clutch!!!
17) Adjustable Field of Vision inside the cockpit...Like in Live For Speed
18) Left Hand/Right Hand Drive option for cars that are produced in both left/right hand drive.
19) Unrealistic Tire Squeal (and questionable physics)
TRACKS
20) Infineon Raceway - Sports Car Course...this one would be really fun online
21) Laguna Seca (I would want to strangle a punter w/ all the sand here...

)
22) Deep Forest Raceway
23) Apricot Hill Raceway
24) Midfield Raceway
25) PD, please don't remove the online events!!! Many of us spend hours upon hours tweaking and tuning our cars for a specific car/track combo. We then spend hours upon hours practicing until we get our technique perfected...and then PD removes those events completely!!! Adding events is fine. Just don't remove them. 👍
I hate racing on S2's (as my only option) and I personally hate Eiger. It looks like I'm going to be playing Live For Speed for a week or two until the events go back to normal...hopefully. Looks like it is going to be a long week. Until the events get fixed, I can't even test my cars with the full PP settings I want. Some basic options to Free Run and tune for the PP of my choice would certainly be nice.