A lot of the rants are valid, I dislike the front blind spot and I removed my rear headrest. But this car has much better all around visibility than the other cars I looked at in the same class; Kia Spectra, the Yaris, The Nissan Versa. I also agree with the soft paint comment, I am not too impressed with how mine is starting to chip off my front bumper. 3M is highly recommended.
You really put a lot of thought into this, but it seems like you are dwelling on pretty insignificant stuff.
-You can put more weight than 700lbs in the car, don't be afraid;
-You knew ALL the options when you bought it, no sense complaining now.
-The suspension is much more firm that most cars, no idea what you are complaining about.
Ok, and here is my "
Come on, give me a break" list
-You are concerned about blocking the tach when you shift?
-Reverse is too hard? How far exactly are you driving in reverse?
-Your old car that has no air bags getter better mileage... uh huh

Give me safety any day.
-32mpg is crappy?
-Your fit is unreliable? Are you kidding me? This car is great, it goes longer between oil changes and I haven't had a single issue with mine yet.
-You car is crappy in the snow? Do you have snow tires? Because if you are driving around on all seasons you have no legs to stand on. My car handles fine and believe me I have dealt with my fair share!
-the entire rant about the dash lights is beyond me how that could actually bother somebody.
I don't think any car you buy will bring you happiness, the Fit is a great comfortable car for most people and mine is a pleasure to drive. Reliable, Good on Fuel, tons of features and options, great suspension.... all the things you rant about seem well above average to me for this class and price range. One final note, a Kia won't have good resale like the Fit.
For the record I am not picking on you, I appreciate you taking the time to put together this report. It is always interesting to see how others think, I disagree but I also do respect you sharing your opinion.