Those are all reasons that could cause FFG to not want to put forth the effort required to support Melee as they do Joust. Thus it becomes a side event, not equal to Joust in there view, and ultimately not requiring the effort from them that they would otherwise be expected to give.
This is exactly what we're complaining about: FFG considering Melee as not worth as much as Joust. Note that they have done Melee OP for years during 1st edition. It's not like they cannot do it, so we come here to say "continue to support Melee, we love it, and if you pull support for it, we'll be pissed".