Hi,
The default control settings are for some settings completely insane and should be changed to some which can actually be used as normal settings.
sorry, but I disagree here!
The controlling is often a matter of personal preference, but the default settings should work fine and be good compromise on all kind of computers and for all kind of pano images...
And please also note - the mouse/touch device itself and their sensitive settings also affect the controlling.
About 'fovspeed=0.5' - I think that would be much too slow,
e.g. try this gigapixel with fovspeed=0.5:
http://krpano.com/krpano.html?pano=panos…ol.fovspeed=0.5
it takes ages (8-9 seconds) until fully zoomed in (when constantly rolling the mouse wheel as fast as you can

)
best regards,
Klaus