it is very difficult to sync blockchain in mobile phone.
not difficult but impossible. (for the time being at least)
agree, current technology is not advanced enough to support decentralization in mobine game.
Ofc technology will move forward, but what needs to be tested is whether this way of combining game with cryptocurrency is promising or not.
now is the stage of exploration, but devs dare to do it, which should be appreciated.
easy to deal with hardware of server, next thing is maintenance of dev team, it matters a lot whether they can fix it rapidly.
updates of game content is also a key point, it will be meaningless if game can't survive for a long time.