I don't have much in my current door pockets but the wife uses here as a trash can. Since there is no time to fix any of this, I bet Tesla adds all these suggestions on next years model.
We put fold-up umbrellas in the door pockets and yes, the little woman uses her passenger side pocket also as a trash can.
I agreed that there is not time to fix this, especially for the Signature reservation holders. I foresee that there will be an up-tick in defections as some of the early adopters realize that soon it will be time to shell out a lot more dough than they have ever considered in the past. These folks will blame the lack of interior storage space for their decision to get back their deposit.
Once we get past the initial ranks of rabid EV enthusiasts and early adopters, and rely on well-healed, "normal" folks to purchase the Model S, if they don't have the necessary bragging rights for the interior to show their rich friends, then they simply won't buy it. This lack of intelligently designed interior storage space is a very serious issue "down the road" when Tesla is attempting to sell more than 20,000 cars per year. The same issue will apply to the Model X when they try to hit their 15,000 planned cars per year.
Larry