No, we actually do know that it's more deadly. And we know that it spreads more easily. That's based on the genetic makeup of the virus and by looking at its genes we can tell that. The R value has nothing to do with that judgement. The reality is that the virus can take hold and infect someone with a much smaller viral load than with a typical flu, and that's due to how it infects someone (it works differently than influenza viruses, and really different from most corona viruses, because it was made in a lab). We know it's more deadly also because of how it infects people (and where). It can infect pretty much any part of the body, unlike most viruses, and so people with co-morbidities are much more at risk, but so are people without any. Exactly how much more deadly or how much more contagious it is doesn't matter. There are too many factors to make a worthwhile blanket statement. But based on the numbers we're seeing, and taking them with a big grain of salt, 2 million is entirely within the realm of possibility.