FWIW the fat lip started in 99 not 2000. My 99 had the fat lip before I swapped it out.
Now having said that - my "fat lip" did save me from some front end damage when I got into a fender-bender in March. If I'd had the regular bumper I would have had much more extensive damage to the grille and fender and possibly to the radiator too. Just FYI.
Not a great photo (taken at night) but you can see where the right side of the bumper was pushed back towards the fender.
A little bit more of a close-up, but as you can see the plastic panel was broken. The center (plastic chrome) grill piece was also broken in two places but nothing else. Honestly, if I'd wanted to save the bumper, I could have, but I decided that since the cost was the same, I might as well upgrade to something a bit tougher:
An improvement, don't you think?
Personally, I never found the look of the "Fat lip" to be offensive. In fact, to me the non-fat-lip 3rd gens look odd and "stubby" compared to the later models. :shrug: