I'd been eyeing the MCU boxes for a while now, and the more I see people bust the less keen I am on it - particularly with them being so pricey in Australia.
FWIW, the MCU app is (so far) actually pretty decent. Much improved over the Star Wars and NFL ones, and so far it seems much more fair to those who don't buy the crystal packs. You still won't be able to get all the sets and awards, but it's still possible with some time and effort to complete ones you focus on.