The Weaver Xtreme tab shortcode was designed from the beginning to be a simple, minimal shortcode.
There are many other features an issues that have a far higher priority for our resources.
Things like simple content formatting/arrangement can be handled with shortcodes that are perfect for more specialized plugin implementation, and not really all that tied to theme features. If you need more capability, then feel free to try other plugins. We are mainly interested in our theme, not fancy plugin features.