Current online SC6 tournaments we have every week are pretty fun to watch. Playing online might not be the same as offline, but guess what, that's the reality of today, so people just need to adapt, which is something professional fighting game players are really good at anyway. Also thankfully SC6 has been balanced to be good both offline and online at the same time by desight from the start as stated by Okubo in the past (remember all the talks around when reverse flapjack ring out nerf occured).
Also PS4 users would have to jump into PC gaming for this one if they really want to seriously participate. No other way around it I think. That is still gonna be cheaper than travelling to Vegas for many people.