I haven't actually jailbroken before or used this tweak but I have heard of SwitcherTweak and plan on getting it when I jailbreak my iPhone and/or iPad when or if the iOS 9.2 jailbreak ever drops.
It isn't really a new switcher, just allows you to adjust the stock iOS 9 one. Like you can flip it back so it's like the current switcher just scrolling right instead of left, you can disable the blurring effects etc to improve performance, etc.