Perhaps not, but it has all the useful features of a piano roll, without losing the tracker interface.
As does mine
My idea has no scrolling, so it’s far better.
As does mine
My idea wastes no space at all. It doesn’t change the Renoise interface one bit, it just overlays the piano roll over the top.
… and so on.
It sounds like you really like your idea, but to say it has"all the useful features of a piano roll" isn’t doing the idea any favors. You might feel like it contains everything that is useful in a piano roll to you, subjectively, but this isn’t an actual piano roll - instead, it’s a “piano roll - like” overlay that gives you visual cues of the musical content in the fashion piano rolls and waveform views do. There’s more to an actual piano roll than that, and someone might find the things lacking here to be “useful features”, which makes this far worse of a piano roll to them 