I'd rather they go with the creepy kids approach as opposed to an older Carolyn, personally. Older Carolyn could get very boring at times, though I loved Nancy Barrett. Carolyn was most exciting in the pre-Barnabas episodes. But that was when she had a man like Burke Devlin to hang around. Little Carolyn would be fascinating to see, especially her interactions with David.
However, in response to LOOKE's question, I hope they avoid the Frankenstein bit. It was the key turning point in the original series, and I have always resented it. It managed to hijack the Barnabas love story and turn it into a science-fiction monster mash, which, while certainly fun, was a huge departure from anything we saw before 1795. So, I'd hope that a sequel would either be a return to 1795 or the Haunting of Collinwood (Quentin).