Well, Bakshi was the first person to suggest putting allout vulgarity into his cartoons, without actually making them more mature than kid's animated films, and that gave way to "The Simpsons", "Family Guy", "American Dad", "Shrek", "Shrek 2" (there is no denying that the "Shrek" films are full of vulgarities), "Heavy Metal", "12 Oz. Mouse", "Harvey Birdman", "Stroker and Hoop", "Robot Chicken", ect, all of which push the envolope in the direction of the train of thought that the only alternative to making an animated film for kids is to make it a vulgar comedy only for adults or horny teenagers. Seriously, I actually do watch a lot of animation, and this is how it is.
For being one of the leading pioneers of leading people of the Western part of the world to think that animation can only be kid's movies or be porn (and for trying to sue Peter Jackson for not giving him some of the proceeds from the "Lord of the Rings" trilogy), I will always, always hate Bakshi and be seriously biased against him.
Those examples you gave might be acceptable to some adults, but they are not tailored at adults. They are made for kids.
These days, there two kinds of animation in the Western World:
Kid's films, some of which can be tolerated and enjoyed by adults (without that being the actual intent).
The other: vulgar comedies.
With the sole exception of some of Don Bluth's films, I have yet to see anything that falls somewhere in-between those two catagories in the vast maturity of animation that's been released in the last quarter century in all of Western civilization.