I just bought iPod Touch 5th Gen with IOS 8.0.2 pre-installed. I like to jailbreak, to satisfy my technical interest only, however, there is not much actual needs from jb tweak actually. Should I upgrade to 8.3 or just stay? Will 8.3 slow down the system? Is there any 'serious' bugs in 8.0.2 that I should aware of? thanks.