http://www.toonfinder.com/dlresort/dca/pp/pp-stitch01.jpg
Heres is a more acceptable picture of Stitch. You can find more pictures of Lilo and Stitch at the Toonfinder website.
I believe that Stitchs head needs to be appropriately sized to his body. Many characters in the parks have much bigger heads than the current Stitch incarnation. Just take a look at Chip and Dale - or even, Mickey. These are much larger heads for a similar size body and do not represent unusual requirements so as to sacrifice the performers health. Look at the photographs of Chip and Dale again and try to tell me Stitchs head is sized right.
On another note: I find it extremely interesting that many critics, reviewers and posters exclaimed how great it was that Disney was finally portraying girls with a more realistic body image instead of the impossible perfection of the princesses, and yet now, Lilo could not possibly be played by a real girl because she is too Muppet-like. I never claimed that Lilo would have to be portrayed by a seven year old! If Peter Pan's Wendy (a twelve year old girl) is played by a twenty-something young lady and she comes off just fine - could Lilo be played by a younger looking College intern - of course she could! Would it be better? That's up for debate.
I hope you will indulge me in a bit of historical context on Alice in Wonderland:
In Carroll's original (1862-1864) manuscript for the story, Alice's Adventures Underground, which he personally illustrated, Alice was not the little blonde girl in a pinafore we have come to know from subsequent illustrations. Instead, she was originally a winsome, dark haired child, whose likeness had been patterned after ten year old Alice Liddell, the child of a church colleague, for whom the Alice stories had been originally created. . . . There have been any number of illustrators whose work has graced this popular tale over the years. The characters appearance tended to vary, according to each artists' style. In some cases, it's thought that more than one artist may have drawn Alice to resemble his own daughter.
Regardless of artistic liberties taken, (Lewis Carrolls final manuscript Alice is seven years old). . . . Walt Disney's Alice in Wonderland is based on both Carroll's Alice's Adventures in Wonderland, and the subsequent book, Through the Looking Glass, and What Alice Found There.
An English illustrator and satirical artist, Sir John Tenniel is perhaps best remembered for his illustrations of Alice's Adventures in Wonderland (1865) and Through the Looking-Glass (1872). Because Sir John Tenniel's illustrations for the Carroll books were so well known, Walt Disney acquired the rights to them as the basis for the visual style of Alice in Wonderland. When the illustrative style proved a hindrance to animation, the character designs were freely adopted for the animation form, though still making reference to the well-known Tenniel drawings.