Assuming my group plays some 4e when it comes out (which is like assuming we'll breathe in June, too), I may experiment with varying the number of healing surges per person, at default values and then maybe lower values to see whether it affects the game's other elements besides just the number of fights per day they can have. Honestly, I may even play with the Star Wars condition track to simulate ability damage, wounds, etc. It doesn't seem that hard to make 4e back into a grittier game if that's my wish; this may change in June, but the info I see now doesn't suggest that it would be very hard.