We need accurate meters! The FDA allows a 20% variance in the meters test results. That is so inaccuate its a crying shame.
We need the ability to calibrate a meter accurately! Currently mfg make meters that cannot be calibrated or you supposedly calibrate a meter with the test strip using test fluid. To say a meter is OK to use if the test fluid results fall between 101-134 mg/dl, a 33 mg/dl swing, is absurd. This isn't accuracy, it's guessing.
I have zero faith in my meter as far as accuracy is concerned. I use it to note trends only.
What we need is a control fluid that is equal to a set amount of glucose, any number will do, 100, 125, etc. Using the existing control fluid only verifies that the strips are within that awful 20% range.
If we could test the meter against a known standard BG level, we would at least have the ability to see how far off they are, and correct things in our minds. Every time I open a new box of strips, my readings change noticeably. Wonderful when the new ones read low

and depressing when suddenly I am ten points higher than expected, during each test.
Given that the number 140 has no tolerance attached, and neither do any of the tests used to diagnose diabetes in the first place, these inaccurate meters are very nearly a waste of time.
There is no way to every calibrate the meters, unless there is a standard to work with, and such a standard has to be a type of control fluid that accurately reflects a set glucose level. Such a thing would cost the consumer for the fluid, and would not raise the price of the meter such that the companies would be less willing to give them away as they do now. The user should not be able to alter the meter's reading capability, but we should be able to know how far off things really are.
Oh, and if I could add just one thing to my meter that should be a 'freebie' I would like to be able to "mark" my readings with a single character, so I could easily scroll through, and see which numbers are fasting numbers. To have several more options to mark with, would be nice, but not necessary, for those who would use a character to stamp a reading as before meal, one hour, and two hours later, bedtime, whatever.
Same as the control test lets you mark it, but of course, we want to retain the reading, not delete it.
John