> The horizontal and vertical swipe option in nice as long as the image isn't zoomed in where it doesn't even work sometimes.
What do you mean by "doesn't work"? If you mean that if you bump into a side, it will not immediately swipe to the next if you start again, that is normal OS X behavior, and nothing can be done about it.
> The scrolling is far from being as responsive as before,
> The app is a lot more processor intensive, it drains the battery at an alarming rate and the fan becomes loud.
If your computer is not very new, make sure to set visual quality to "Low". This is closer to what 2.2 uses.
> The option to mask the mouse and the scroll bar would be great
"Mask"?