I'd love to see the following:
Floating palettes that are customisable, being able to keep the poly tools on screen without having to open a menu would speed things up.
A tweak tool similar to what you have in Modo, this allows you to modify the transform, scale and rotation of any face, vertex or edge you hover over.
Custom work plane that can be assigned to any face.
Array and loft tools that can use custom paths or splines.
SubD's so that we can do high poly / low poly for baking out normal maps.
Keep up the great work, this is the best tool I've seen yet on the ipad pro!