I really hope they will bring back draft...maybe do it like Solforge did before...run it as a weekend warrior event. Since the event is limited during the weekend , it should keep the player count higher for better matchup. Each tix will allow you to play up to 7 matches. But if you lose 2x your run ends. You get rewards depending on how far you can go. You can always use shards to get more tix if you want.
Also, instead of picking one card out of groups of 3 cards like in expedition before, just make it like how we open card packs in real world draft. Player have to choose 1 card out 6 random cards for the first pick. then the next pick is 1 card out 5 cards, then 1 out of 4 cards, so on and so forth with each pick the player choose from a smaller number of choice.. then start again (akin to open a new pack) until we got 30 cards. When the player picked card from two region, the region is 'locked' and only the cards from these two region will be available in each picks. - This draft method will be easier to manage as the game admins do not need to constantly switch up the cards in the pool and do rebalancing etc. There will be a lot of RNG of course... but it will be fun