I think you nailed it there for me.
I reckon wether or not you're going to like this, or not be bothered, will depend on how and what you are going to use it for.
I have a HD 500X and when i'm in rehearsal with the band, sometimes the preset that I created for a new song, that sounded great on my own, just doesn't cut through the mix when playing together, and I have to spend ages poking around the menus to sort it - which is a right pain in the lollipop.
I'm hoping this unit is going to bring a new dynamic to our rehearsals and gigs - i.e. editing on the fly and trying out stuff without p****g off your band mates.
There are a lot of "great" sounding modellers out there. So long as the sound on the Helix is "great" - I don't really care if the unit is better or worse than Axe FX or Kemper. I get the feeling this unit is going give me more confidence in achieveing the sound I want on the night, and personally that affects my live performance. I guarantee 90% of the crowd won't have a clue what I'm playing with anyway - they just want to have fun ;)