While I wouldn't do this for 4ed. simply because of the "messyness" of making such a change mid-edition, I think a good way to go about these "non-adventuring" skills such as professions and perform would be to treat it similar to how 3.x did, but separate from the "adventuring" skills.
In other words, players would get X points (or trainings) in adventuring skills (stealth, acrobatics, etc.), and then get a separate pool of points to spend in non-adventuring skills (craft, profession, perform, etc.).
Of course, not every DM has these problems and I may well be in the minority. ;P