OP, I know you've gotten tons of answers, but wanted to chime in given our many experiences at the GF. Yes, I would absolutely return to the Grand, but can understand your question. What is right for me and mine is not what is right for every family.
It's not at all hard to avoid the beach area, in fact, we rarely spend any time there in recent years. The themed pool (named the Beach Pool!) is adjacent to the beach, but there is the Courtyard Pool in the center of the resort, surrounded by the outer buildings, and the Alice splash pad is within viewing distance but not really near the beach.
However, there are activities on the beach you may feel hesitant to attend. If this would significantly impact your visit, then perhaps choose another resort that would better fit your needs. AKL does not have a beach and the animal viewing seems to enthrall kids!!
Either way, I hope you and your family have a magical trip!