While planning my conversion to 2.0, I am running into the same problem again and again. What will the Hyperspace Trials, Cups, and the 2019 X-Wing World Championships look like? We have seen some of the Deluxe Wave Kits and some details of the Wave Championships designed to replace Store Championship events. They do seem to allow for a few different types of play, however, the name "Wave Championships" and a good bit of gossip points towards the tournaments involving only lists constructed from the ships already re-released in X-Wing 2.0.
For example, in a recent episode of the Gold Squadron Podcast, host Dion Morales mentioned that he believes that this is the format the highest level of competitive events will take. He explained that, if not, it will be very difficult to balance factions because the Rebellion, Imperials, and especially Scum will have many, many more options for list construction. This is just one opinion and one small section of the discussion of course, but it's coming from someone who just spent time talking to developers at GenCon. It also echoes what many other less accountable sources have said.
I personally hope to be able to use anything in the conversion kits in those types of events, but will still participate either way. Anyway, I definitely still think that conversion kits will be useful for card options. I hope that FFG lets us know their plans soon, because I have zero doubt that they have already made this decision.
I can see either situation happening. Either FFG decides to allow converted content that has not been re-released in 2.0 into the highest and most competitive levels of play or they don't. The answer will definitely effect what I buy. What do you think will happen? What do you want to happen?