I must admit that the fact that you can set the pitch value to +/- 4% offers a remarkable precision. But sometimes the next track you want to match has a much lower or higher BPM which requires you to switch to +/- 8% which is less accurate.
Why not propose the intermediate value of +/- 6% which allows to extend the BPM range without losing too much precision.
Moreover, a lot of pioneer CDJ users like to use the +/- 6% range. And I think it would allow many of them to migrate to Denon products without losing their habits.
And I don’t think it’s something that’s very difficult to implement. And it would be much more useful than +/- 20, +/- 50 or +/- 100 % ranges that almost nobody ever uses.