I believe it would push many people towards a purchase if there were more upadates/add ons planned. The amp models provided by the helix/HD500 are great but it would be nice to have more choice like the axe fx does, especially when the axe fx is what the helix is designed to compete against. In the pod HD Pro facebook group many people complained that the new add ons weren't free but as the units only cost a fraction of the price of axe fx's it's easy to see why they would be charged for. However with the helix being a much more expensive and advanced unit, again marketed to compete with axe fx it wouldn't be unreasonable to expect the same updates/add ons regularly and FOC.
The kemper are really the only future proof unit at the moment as when you want a new amp model you can just get a new profile.