The starter decks are really terrible. I think they need some changes not just the best basics added of course (Healing Mystic, Tigers, etc.) because why should people replace cards then. But they need more 2 drops as an example. Often you miss on T1 because of that and lose the game then.
I really like the idea of the Rift mode as a casual ladder with no end to it. But the wins in it should count to your quest progression, not only the played games. And at a certain lvl you should get a little reward like a common crate key. Not too much but more than nothing.
Not sure though if you really want to disable Gauntlet for the whole month. Something like in beta seems to be better.