I want to be able to change whether a grid is scrollable, as its datasource grows or shrinks, without having to destroy and recreate it, and I want to control whether the columns are equal width or auto-sized, independently of whether it's scrollable. I also want to change its height, and turn on and off the option that lets it auto-size itself.

(Also I'm running into a similar issue with charts, where I can't change the tooltip template after it's set.)