I imagine that either this has already been asked or is already implemented but I can't find how, but just in case...
If I try to zoom in on a Preview then the zoom always tends to the centre of the bed, rather than to the area I want to inspect. So, if I'm looking at a feature towards the edge of the bed, it's not possible to zoom to it to see how it is sliced.
This seems like a pretty fundamental failing (either in the software, or my ability to use it).
Second this request. Although I don't consider the current way of operating necessarily a "failing". The two approaches are simply preferences. The current approach where the zoom is based on the center of the viewport I'd consider the "novice" mode, and might be kept for newbies.
The "pro" mode is definitely to have the mouse wheel zoom to where the mouse cursor is pointing. This is the way Blender works, and probably other editors.
Because a lot of "less professional" software does tend to zoom to the center of the viewport, it tends to be what non-pros expect. It's also the "lazy user" way for zoom to function because the user doesn't have to pay attention to where their cursor is. Regardless of where their cursor is, the zoom is always the same.
The "pro" approach of zooming to cursor requires more user discipline because the zoom appears to be inconsistent until the user learns to pay attention to where their cursor is.
All that being said, Simplify3D definitely should implement zoom-to-cursor as a user selectable "pro" option while retaining zoom to center of viewport as the "newbie" option.