I like the elf look though I never liked the character. The wig added 20 years to her age I thought though if they were going to run with the lifespan idea this would have been fine.
B'Elanna must have had her teeth humanized as soon as she could do so without her mother's permission
I bet though that when she's middle aged she'll be right into her heritage (more than the dabbling we see) and she'll go out and get them filed. If she's still got Paris around I predict a dynamic not unlike what happened with her parents.