I completely agree with you with regard to Wasp's Alter Ego ability. It's a very powerful ability, and there are so many great mental cards! And you're right about using Side-Kick on Quicksilver in Scarlet Witch's deck. I just used that combination yesterday! Overall, I really liked your choices for favorite cards for each hero in Wave 2.

Another thing I found interesting in Hawkeye cards is its obligation. Unlike most characters of this era/wave, you better just flip to alter ego without exhausting when it is reveal. You will lose your bow, for sure, but you will get it back for one card as soon as the hero phase begin. His obligation is like "0 cost event, exhaut n heal for 3". And if you have down time in play, and I surely do, it is now "0 cost event, exhaust and heal for 5". And if you have Ready to Rumble from wave 4, you can also ready. It is like the designer knew he was squishy, and gave him an obligation that is fully benefitial for the player.