HAT is a good mode, however there pressing on the gas purchase terms, buy packs of cards so you can compete against anyone. Without top player one is lost there.
I hope through the updates that will come / to get to something else, so far it seems to be a lot to cut down version for that price.
PS
Until now I have not received the code from Amazon as a pre-order bonuses for this HAT packs, I hope that comes soon.