Thanks for the feedback!
1. I've lowered the stats of the wingman guy at the level 2 in the latest balancing update, I think it should be easier to deal with now with all the tools you can have at your disposal by then (damaging cards, boosting your active stat cards, having higher stats to eliminate it in one attack, silencing its effect);
2. Very good point. In the next update, I'll make it impossible for any level to start with 3 Rival cards.
3. I'm not sure if I understand this one. You mean swapping cards from hand with cards from your deck at any time? Being abale to swap any card would be OP, because you'd basically have access to any card in your deck at any time. I don't think any card game does that.
At some point, I thought about giving the option to the player to at least be allowed to discard any useless card from their hand, so they'd at least have a way to free some space for other cards that might be better for the situation. But I ruled out against it. The reason for that was that I want to add more cards in the future with effects/synergies with cards in your discard pile. There are already some effects like that and I want to add more. Giving the option to the player to discard as many cards as they want for free, would make that archetype super easy to achieve. For it to be balance and work properly, there should be a price to use and send cards to the discard pile.
So, I don't think I'll change anything here, for now. If you meant something else on point 3, I'm sorry, I might have misunderstood it.