The feature set of this plugin is based around Phoca Cart and eWAY. We have tried to incorporate a full feature set as determined by these two products. Unless either of these two products change radically, it is unlikely that we will be expanding the feature set going forward.
We will, of course, work to resolve any bugs, but reserve the right to determine that something you see as a "bug" is in fact a new feature, and decline to add it.
If you have a feature you'd like to see added, feel free to add a thread in the forum. However, don't be disappointed if we indicate that there is no likelihood that we will add it into the product.