Paint brush set to draw brush type(Under advanced when you click on brush in the header) is the same as draw. Change the blend mode(at the top of the brush settings) from Mix to Add. That will be the same as the add brush in older versions. If you change it to Subtract it is the same as the subtract brush. As for selecting the bones are you using shift+ctrl+left click? or Alt+left click. Older versions used ctrl+left click.
