why can't SW have a draft both sides for neutral plane and parting line drafts?

why must I split a surface at the neutral plane and then add two separate drafts to achieve what Creo does in one step?

why must I go through the tedious selection process of picking all the parting lines to draft in one direction only to do the same thing in order to draft the other side?

any why can't there be a draft preview, also like Creo does?  if they can preview radii, chamfers, and most other features, why can't there also be a real time preview of draft as it is being applied?