This is my first card game like this. I was always more into Poker, Hearts, Spades, etc
After 5 days of playing, my wins are like 185 to 52 losses. I'm in bottom tiered Platinum, and probly will be in diamond in another week.
Are you counting combined arena and ranked wins? I'm 136 constructed/42 Arena and I'm 3 star platinum. Either way, your statement pretty much explains one of the things I dislike the most about the game. The idea if you just play more you are going to be a higher rank. And the fact you have such a high win loss ratio but still have a lot of rank to go through, play diamond master. I suspect your wins may actually be lower? Either way, the medal even says 'win more games to advance to the next medal'. Rank is more of a grind than something you earn. You can't lose rank. It's really not a measure of skill compared to a ELO system. So you are stuck grinding away vs newbs even if that's not your skill level. Instead you grind away and get a high rank, which people don't even see unless you are streaming. There is no way to start a game and see, ohh dang I'm up against a 3 star master!. Rank should be something that better represents skill level and should be something you have to maintain. Not something you grind towards, if its going to be used to match you up with people to play against.
Its more like a kids county fair and every tummy gets a gold medal! But that's expected with blizzards cater to everyone model, that works well financially.
The mechanics aren't super bland where everything is just + stats. I wonder if they are going to be able to release expansions fast enough to keep it interesting though. My guess is they won't and the game will get stale before they release new content.
Its a CCG and not a TCG. Since you can't trade and the best cards are limited to 1 and everything else 2, it makes opening packs less interesting in the long run. If you open a pack with the best card in the game and already own it, its not exciting at all. You just melt it for dust. If it were a trading card game you'd be excited to trade it away for other cool cards/more packs etc. If you own all the cards, opening packs is boring and near meaningless. The excitement of opening packs goes away quickly in this game.
Arena is a net moneysink where other games like MTGO/HEX are a net gain to the system. MTGO 4-3-2-2 or 8-4 has an input of 24 packs and 16 tickets and an output of 24 opened packs to players and 11 or 12 new packs into the system. So overall the players come out ahead. In Arena even if you go 6 wins 3 losses you barely break even. You don't keep your cards so you end up with a pack you have to open. You really need to go 9-3 to recoup the entry fee. That means overall more gold is leaving than coming in. Not surprising but at the same time other TCG let the players come out ahead in the long run.
The game is pretty fun, I don't think it will have a long term sustainability for dedicated players. It lacks the social aspect of the game which is one of the big reasons to play a TCG/CCG in my opinion. You may as well be playing vs really good AI. And maybe you are?