One of the things I noticed about my performance was that it dropped immediately after entering the Folrart arena.
I'm not THAT good a player, to be honest, but I also don't have a ton of money for cards. I was rockin' the starter deck and maybe a booster pack or two, and things were okay in Crest. I went about 60-40. Then, I got to level 10, and Crest was no longer an option. I was plunged into a playgroup that I was nowhere near prepared for, and I ended up losing all the time. I still lose a great deal. I just didn't have the card pool OR the experience to deal with cards I'd never seen before, strategies that I'd never encountered before, and players that have been playing far longer than I have. I didn't stand a chance, and really I still don't.
I'm not complaining really... all I'm saying is that it would have been nice to have a little more time in Crest, where learning-the-game losses wouldn't impact my rating.
"There is nothing you can see that is not a flower, nothing you can think of that is not the moon." ~Bashio