Just write your signature with the pencil tool and you will figure out that its not working great. Check out Apple Notes, where you can write without any problems. The key of the pencil tool is the path (having one path, not an outlined path). We don't want to write with the brush as we want to be able to adjust the border width at any point.
Its the same as this one:
https://illustrator.uservoice.com/forums/931888-illustrator-ipad-feature-requests/suggestions/41681191-pencil-tool-options-like-on-desktop-illustrator
Just write your signature with the pencil tool and you will figure out that its not working great. Check out Apple Notes, where you can write without any problems. The key of the pencil tool is the path (having one path, not an outlined path). We don't want to write with the brush as we want to be able to adjust the border width at any point.