I'm inching toward hitting the Gold League, and I know damn well what that means as far as level caps are concerned and that I will not be facing level 1-3 cards on average. Rather, I'll be facing cards which are much closer to being maxed out than being level 1. I know because I've been there before.
Luckily, I have access to some pretty decent cards that I've delegated to myself from my main account. These cards aren't maxed out, so I can't use them normally, but this account can still get good use out of them while I work on climbing the ranks.