Tailwind and Strata are somewhat similar, but there is a difference.
Strata I assume was made to be a buff card. You get a cumulative bonus, and it increases damage stably. However, it costs a decent amount of quanta and needs a card slot. Because of the amount of quanta that needs to be invested into strata, you need a deck to be built around it.
Tailwind was designed to be basically a free card. You don't base a deck off it, it compliments existing decks.
You play it, get a bit of a boost to warrant the cost, lower your deck size, and get your other, important cards more quickly.
This gives air a bit more of a sense of freedom and speed, which I think it lacks atm.
Actually, after thinking about this, I've decided that tailwind is a little bit expensive. I'm going to give it a slight buff.
EDIT: Card updated =O