The 4x8 keyboard (and therefore the 16x8 requested here) can be used to play in real time, live recording or just playing for fun. The piano roll offers something different, so this wish still makes sense. If anyone is satisfied with the new piano roll, they can always remove their vote here and use it somewhere else.
Actually would be helpful not only to have notes to play in the 16x8 grid. But what about chords within the scale soy you could have many chords in different octaves and with different variations.
This is a good idea, following on your own suggestion at New feature: Chord mode like the OXI. The full pad only for notes might be overkill for most people and scales. We could have two regions of 8x8 pads, one for notes and one for pads. That would also put developers and users in a very familiar territory, given that 8x8 pads are commonplace for notes and chords (Medusa, Launchpad, etc).