My w2s aren't that stable, there aren't many that change year to year.
I don't have to re-enter very much, and the import from PDF means you enter even less. It is a huge step up from having to do my taxes by hand by editing PDFs and maintaining a spreadsheet when I was in China because tax software couldn't deal with the foreign income exclusion yet.
But ya, if I only had w2s to worry about, I would expect to file nothing like when I was paying Chinese/Swiss taxes (well, China had a weird self report you had to do yearly, but it was in Chinese and I just copied the numbers via a powerpoint management gave us). Of course, in either country, if you have a non-trivial situation, you had to file something as well.
It doesn't need to? It should have all your information from prior year pre-entered, except the wage numbers that change.
That's the value proposition. At least don't make people re-enter their address and employer information again. (unless it changed, obviously)