At first the history is not going to be quite the same as full parametric modeling, it will be more focused on letting you edit the curves that were used as input to other commands such as extrude or loft.

But I have a lot of plans on improving the history over time, eventually it will become more possible to do more types of parametric style stuff. But the thing that will probably be missing altogheter is the concept of "constraint-based", which is another mechanism that those parametric solid modelers are based on. But that's also the part that makes them feel like you need to be working on a blueprint as well... It is powerful for a lot of things but as you mention tends to force you to do a lot of set up stuff, you don't get to freely draw so much.

You'll be able to mess around with the first history stuff in the next beta, which is looking like it will be on Monday.

- Michael