Sorry, forgot about answering...

> One that I could think of was that for the visualization of matched keypoints using ORB, we would need to scales to emphasize the octaves of the keypoints.

That's not a convincing argument for me. For the purpose of visualization you could simply call the `detect` method...?

While writing this... I maybe changed my mind about this again... :-)

As you suggested, we should maybe just leave it the way it is now... and in case users complain about it, we can change it afterwards. I think there is no silver bullet interface - both have their advantages and disadvantages. Are you OK with that?