If it's nice to operate, it's a buy from me too. I love my pedalboard, but it's really expensive and still has a lot of inconveniences that a multifx unit simplifies greatly.
4 > 3 every time, whether it's knobs or footswitches. 3 is the wrong number of knobs for anything that isn't a simple overdrive or similar.
I don't think it is. I think this is a bit of a mid-gen device that is meant to pack Fractal's great effects into something a bit more compact and cheaper than the FM3 without cannibalizing their existing products.
If it has all Fractal fx this could be a great unit for people who are fine with 1 amp + cab but want a bit more from fx than what the FM3 can do.