It was a decent mode, particularly when it first released and had the sticker book collection vibe, now it's the biggest pay to win scam going. EA don't particularly help themselves by oversaturating the game with OP special cards, that again, unless you're really lucky, you have to pay for. Chemistry needs a massive overhaul too, but the way I want it (players building up chemistry by playing with each other for sustained periods, or having previously played together) would result in less packs being bought. And ultimately that's what the mode's all about these days.