I love the iPad version. I continue to be utterly floored that it runs as well as it does even on my aging iPad Air 2. I would gladly play this version exclusively if it had the expansions. Indeed I bought a closeout iPad Pro 12.9" 2017 primarily for this purpose, which is even better except for the lack of built-in retina support - I have to fire up the keyboard every time it launches to set.
That said, I'm getting increasingly frustrated over the lack of updates from Aspyr and am beginning to fear that they just aren't able to pull off their magic for the first expansion, let alone the second.
At this stage I wish they would just break the news that the expansion isn't coming and instead release an update to the base game that allows enabling retina mode in-game.