Text elements in tasks or at gateways can have issues with proper spacing and readability.
So far I often edit the svg to properly align/size the text, but of course then I cannot reedit within this awesome tool ;-)

Describe the solution you'd like
For starters, it would be very helpful, if I could resize the textbox for gateways similar as can be done with TextAnnotations.
Longer term text sizing and markdownsupport for simple formatting would be great.

Describe alternatives you've considered
So far, I always use inkscape to edit the svg giving svg_A. Then, if needed, I change the bpmn in bpmn.io and export a new svg svg_B. Then I open svg_B, copy the changed parts, delete the changed parts from svg_A and use paste in place.
This is quite cumbersome.