?Most of the layer creation, including thematics, has been supported via the creation in MapInfo Pro and uploading. Certainly the creation of non-trivial layers is best done inside a fully interactive environment such as MapInfo Pro. However, in 12.2 we have added functionality that allows for the creation of layers with simple override styles and zoom or scale based visibility. You can also combine layers into maps and there is a new web UI for creating simple query (named view) layers.
We have certainly discussed the idea of adding the capability of thematic layers into Spatial Manager. For those of you who know MapInfo Pro, there is a significant amount of user interface work in creating and modifying, types of themes, expression checking, number of bins where appropriate, picking all the styles, spreading the styles and choosing the statistical approaches (equal count, ranges, std dev, etc.). All of which we already do in another product (MapInfo Pro).
I would be curious how far the community feels we should go down this path and what their feelings are about better integration with MapInfo Pro as well.