By control I mean there are less commands available for sprites than there are for 2D images
A sprite in Blitz3D is a 3D object not a 2D object, so it has an ENORMOUS number of commands relevant to it... you need to remember it's an entity and anything you can do to an entity, you can do to a sprite. (Note that by default sprites face the camera, but you can change override that).
If you're looking for a bunch of sprite-specific commands that eliminate the third dimension (which is what HUD libraries do) then you're basically missing the point.