On the "is more deadly important" question. Some sums.
If we continue to drive down infection by 20% per week as we are now, we'll only get another 1.4 million cases altogether, about 3.4 million actual infections assuming we continue to detect about 40% of them. Half of those will be in the next three weeks. At an IFR of 0.75%, that's 26,000 deaths. Altogether. Half of those infections will be in the next three weeks alone. By 20 weeks we're into no more than 600 cases daily. This is the power of exponentials.
If the virus turns out 30% more deadly, those deaths become 34,000 rather than 26,000. Bad, but not a huge change.
If, on the other hand we allow the virus to become 30% more transmissible, by slackening controls or new more virulent variants, it will grow exponentially at 4% per week rather than declining. Let's say it takes 20 weeks to vaccinate most people.
Now, we'll get not 1.4 million, but 8.4 million new cases! Over 150,000 deaths rather than 26,000.
Growth rate is far more important than mortality rate.
(the figures here are from straightforward exponential functions, take no account of vaccination, and are in no way a prediction, just intended to illustrate how we should focus on getting cases down rather than worry about fractional changes in mortality)