A part of me can’t help but feel that the nature of the show is always going to have this delicate balance where they deal with characters sufficiently and not include too many. For right now they have a lot of characters (regular, peripheral, and only when necessary). But then truthfully it’s sort of difficult to then see that some character like Jack was dealt with so quickly. That seems to be the only way of dealing with the majority of future characters. Then if they do add a couple of new characters to the mix I hope that they really do add to the storyline.
For instance I absolutely love the theory I have read about Hook and Ariel. It fits so nicely so in that case I wouldn’t then mind her being added as a ongoing character. (Although I would find it funny if Hook’s name was Eric Killian Jones 😛 )