I would love it to be a standalone box. And actually half the size. Just go with 32 pads 8 x 4 - that would be the ultimate. I sold mine due to the bulkiness basically, but I have to say I do miss it. It's so great for controlling an Ableton set, and for general playability.
I still think navigation could use work, for using instruments or programming a patch, it's still much faster to just knock it out with the mouse. And this might sound weird but something like Apples touch bar would go great somewhere on that thing. Touch control would be awesome for a dynamically changing set of controls with minimal pressure needed to activate a setting.
If it went more of an MPC live route, I'd be stoked. Imagine a box of that size, taking Operator, Analog, Drum Racks and Sampler with you on the road, built in interface. Jam it all out. Then plug in when you get home and the whole Ableton set is there. That's the dream for me
I think the jump to Push 3 and Live 10 will be huge.