Scotbill:
The 767 is fairly advanced. The 727, CE-500, Westwind 2, C-130, DC-8, Twin Otter and the Classic 747's (10 kt autoland XW limit, BTW) that I have flown didn't/don't slip on final when coupled. 767 slip is not very dramatic either, as some crab is used in combination.
Kicking it out in the flare is a fact of life with most airplanes. A crab in an approach to a gusty mountain airport makes for a much more controllable and comfortable approach compared to attempting the same with a slip. I think you'll find that most high density altitude, spam can, mountain pilots will agree with my assessment.