I'm going to share this request with the Draw team but my understanding about the tilting with Pencil is that it requires certain types of drawing tools.... which really aren't in Draw.
I'm not trying to steer you away from the conversation or the product, but have you looked at Photoshop Sketch? Not only does tilting Pencil work in the way you're wanting it to, but in the current release, there are (seemingly endless) blend modes for most of the brushes. I've talked to a lot of calligraphers who use it. Definitely give it a look: Adobe Photoshop Sketch on the App Store
In the meantime I'll share your comments (and the accompanying links and images with the product team.
I am sorry! I am confused. Adobe Draw already has an angle parameter in the brush settings. Making it ideal for calligraphy.
It would be great if this could be hooked to the azimuth angle of the pencil.
I am not sure if you mean that one by "tilt". To me it sounds like you are talking about the altitude angle. Even that would be useful to read. For example to control the roundness parameter of the brush.
I wasn't able to find such a parameter in any of the brushes in Photoshop Sketch. The angle of a Sketch Brush seems to follow the path of the drawn line. In total Illustrator Draw already has much more control over the brush paramters build in.
In both tools the only two available dynamic settings are pressure and speed.
Sorry for not responding sooner. I was going to mention the Angle setting in Draw but I thought maybe you were looking for something more than that. I'm glad it's what you need.