When holding down the Command key modifier to zoom vertically (changing track heights etc), the scroll to zoom behaviour on both the Apple Magic Mouse and the Trackpad on Apple laptops is way too sensitive (using current latest 5.5.1 here).
Barely moving your finger up or down to scroll while holding Command makes the tracks jump between being as tiny as a line or as huge as your screen.
Scrolling around the project window normally is totally fine - that speed is exactly as expected ... this really fast thing only happens when the modifier is held for the zoom function.
Other DAWs (I'm coming from Cubase) do this perfectly well - it'd be great to bring that part of S1 up to scratch ... please slow it down!