I'm actually completely fine with Tom Bombadil's omission from the LotR films, as they pay homage to him in Fangorn during the Old Man Willow scene. For curiosity's sake I'd be interested to see what they would have done on the design & casting front, but to me the character was never really that crucial.
Whereas it's a bit disappointing from a book readers point of view that Beorn got reduced to that kind of character. I do like his scenes but he's little more than a magical enigma
