Well, im currently playing a Sentinel now, and did you see how short they really are?? They wear at least 10 inches of platforms and another ( give or take ) 5 inches of heels! And they dont even reach the chins of Whippers! This could be a big reason why many people are screaming "child pornography!"
Personally, I love my little Sentinel, coz she is hyper, she bounces up and down when she runs ( not her boobs ), and basically behaves like a little kid xD ( and her guns look like hair dryers to me >_> )
I would like to acquire costumes for her though, I really want that pirate costume with her guns hanging by the side of her legs!
All in all, I think Sentinels are great just the way they are, though, I wouldnt mind if there were a little changes to the points mentioned in previous posts.