Hi Brian,
The slider is more of a convenience - it just duplicates the functions of the buttons at the bottom of the panel. If it does prove to be confusing, I'd be inclined to remove it entirely.
The hover behaviour does seem to be inconsistent, and I'd call that a bug. I *think* that is a recent thing, as I haven't noticed before and I thought I would have if it had been happening for a long time. Unfortunately, it almost certainly won't get fixed before we release now. the 1.0 version is close to being frozen now.
Regarding what gets displayed here, while it is true this is only switches now, we should have the RV32x routers included in a couple of months, so it is a really short window of time when it is switches only. I'd be reluctant to change the navigation immediately after the product first ships.
Cheers,
Dave.