I have been digging through the spectrogram idea (within this forum) as of lately. I think that having it as a native plugin would be excellent.
This is quicker for us users, as I have difficulties understanding just how one adds the spectrogram view via the Wavesurfer plugin (where to write what code). In the linked post, the user speaks about adding the custom JS to the recipe, but I'd love to have a more detailed instruction as to which parts to modify (within recipe.py and in other files, too).
---Edit---
After some more digging, I found this post, detailing the how-to: https://support.prodi.gy/t/custom-view-templates-with-scripts/302/19. I am leaving it here so others can include the spectrograms more easily.