As much as I like the quick adjustment of note length, there should be a way to fine-tune it. Otherwise, true musical articulation is impossible!
Example with 4 tied steps: It should be possible to choose the total length exactly, for example 315 (3 steps + 15% of 4th step).
4 tied steps with legato to the next note: > 400
A possible solution: Short press the corresponding encoder to get to the PERCENT number.
Interestingly, the RANDOMIZER shows the note length in %.