I'm relatively new to Infinity wars but I love the mechanics and strategy to it. I'm currently entirely a free player (though I'm considering buying some LP just to support Lightmare and the mysterious publisher) so I'd like that all the cards remain available to free players, though I'm fine with people paying money to speed their progression. I'd love to see a database added that lists and explains cards and their effects. Maybe I'm an outlier but the basic concept behind the game and the playing part was not hard to grasp, but the strategy and effects are, and that's probably where most of the new players will be thrown off, because they can't learn the strategy well in the current state of the game unless they are dedicated.
Towards that end, I think a new player queue should be added, separate from the pauper queue. Personally, as soon as I pulled my first rare or higher card I started building a deck around it if I could, so I never played many pauper games. Maybe make the queue have a level limit, so only people below a certain level can play in it and its more likely that they get someone in their skill level and not a veteran throwing agent coyles and martyr golems at them.