While I agree that having some more juice in there would be beneficial, I just did a trip to Steamboat Springs and back this past weekend. A big chunk of that drive is 2 lane highways with minimal opportunities to pass, and most of it is between 8,000 and 10,000 feet in altitude. I found that drafting a bit, putting in sport mode, I had no issues getting past cars going 60 or so, then returning to my lane.
As the commercial a couple years ago went...more is better. But I've found the lack of power to be a non-issue for me and the way I drive in the mountains. Overall, I've not really had to adjust my style of driving from my 6 cylinder Acura TL with the exception of it not handling as well on curves at speed, and understandably so.