I'm hoping all these things will get resolved with the new version of Jahshaka, but there's a lot of ground to cover.
I don't believe it had any vector or paint based masking tools beyond it's 2d paint program and titler meaning currently Wax has more video compositing power than Jahshaka 2. The node linking in Jahshaka was nothing more than a visualized stack, and with out layer linking like in After FX it's compositing capabilities were limited. I mean one could manually key in ease, but that's a lot of waisted effort when Blender and Ramen have full F-curve editors and even Wax has basic key frame easing. One of the bigger problems it had was linear key frames.
Tools that worked in one part of the program worked differently, didn't exist or didn't work in another part. One concern is the chaotic interface it had. I have many concerns about Jahshaka that if not addressed will prevent it from being taken seriously in a professional environment.