Are the changes vast as far as the lines go? You may be able to create a symbol, and then when you place the symbol in the drawing, you can edit the definition of the symbol, and then redimension the lines as necessary. Then again, when you edit the symbol, it will not show the view while you are editing it, so it may make it a little difficult and time consuming,
The only other thing I would try is this, make your initial drawing, add your views and sketches. Then check that drawing and the attached assy in, but keep a copy of just the drawing in your project folder. The initial assy needs to be out of your project folder. Then, bring in the new assy to your project folder. Open the drawing, and it will ask you to resolve the link between the drawing and the assy, so resolve it with the new assy. When the drawing opens, the view will show the new assy, and the sketch will still be there, so you can now edit it to work with the new view and not have to create the sketch from scratch. Other than that, I can;t think of any other way without redoing the sketch each time.