The current US mortality rate stands at 115/7,663 or roughly 1.5%. Deaths do lead infections so 2% is probably more accurate. However, the 7,663 infection count does not include tests for the 80% to 85% of cases that are reported to be either asymptomatic or have symptoms so mild that they are never tested. This means the 7,663 count is only 15% to 20% of actual infections, meaning actual infections to date are between roughly 38,000 and 54,000. If the undercount estimate is true, the actual mortality rate for the Wuhan Virus is actually between 0.3% and 0.4% and much more aligned with flu mortality rates. Random population testing is needed to accurately evaluate the undercount because it’s the mortality rate that is one of the key reported factors driving this panic.
I think you're getting close to reality here.
Of course, we can only speculate or possibly try to estimate what we do not or can not measure, count, and test.
CoViD-19 tests presently available are likely immunoassays, probably ELISA tests like I used to create in the lab so I could measure the presence, or quantity, of the antigen I was seeking. These tests are "Enzyme-Linked" meaning you link an enzyme that will permit amplification and visualization of the immuno-specific antigen.
Scientists can develop such tests for either antigens or a specific antibody. And just to note how far we're getting with PCR in the genetic testing, we have lots of scientists sorta daily reporting how the genome is changing. These guys can directly test for the presence of the genome, and 'see" miroheterogeneities that are appearing in the population of current virus samples.
However we can do it, we need to do a statistical evaluation of the population to estimate the number of people who have antibodies to the virus, as well as to estimate the number of people who have the virus onboard..... along with the reported "cases" however we determine that based on symptoms, however light or fleeting..... as well as a good count of actual patients and the outcomes of their illness.
One very concerning issue is the severity of the illness and the number of long-term impaired "recovered" patients.
Knowledge of all these things can help us move on from the sheer panic and sheer politicization of the pandemic.