Now that Hearthstone has been out for a few years and received quite a few expansions and adventures how do you keep it fresh? It's an interesting question for one of the most popular multiplayer games around and the developers answered it in a couple ways. First, in the last expansion Whispers of the Old Gods they dropped a new game concept of Standard Mode and Wild Mode. Standard ensures that the game constantly rotates in and out sets in a yearly cycle keeping the game meta fresh. If you want to keep playing with your old cards, Wild Mode allows this and thus Hearthstone took a page out of the Magic the Gathering model of keeping the competative game fresh while allowing you to keep playing the cards you love. Mean Streets of Gadgetzan builds off that but takes it one step further by adding factions. There are nine classes in Hearthstone and in Gadgetzan they fall into one of three factions called the Kabal, the Goons and the Jade Lotus. Each faction has special cards and mechanics that can only be used by the factions themselves creating a interesting way to share neutral cards. Each faction has a theme that carries over to their card design such as the Goons buffing cards in your hand, the Kabal providing magical potions and upgrades and the Jade Lotus stealth and Jade Golem cards. The factions bring an interesting play element to the game and really spice up the classes and have thrown WAY more competitive and varied decks into the game meta.
After I opened Gadgetzan packs I held out on crafting new cards until the meta stabilized. Whereas people are still refining decks and trying out different play styles I think things have settled enough for me to craft a bunch of cards for decks I find really interesting. I really enjoy Reno decks and so far have had a blast playing Reno Priest and my favorite deck of all time, Reno Warlock. Both require you to scrap in the early game for a win but if things snowball in your favor the games can be very rewarding.
So far the cards i've crafted are a Dirty Rat, Kazakus, Aya Blackpaw, Bloodmage Thalnos, Jade Lightning, 2 Mortal Strikes, another Doomsayer, Buckaneer and 2 Jinu Waterspeakers. I'm really happy with those crafts and was lucky enough to open cards such that I had enough dust to craft them.
If you are looking to head back in to Hearthstone or have yet to make the plunge now might be a good time to play it. I am completely free to play and have found the grind VS fun to be a very balanced element. Early on things were rough but I think the game is worth plunking some time into and for people that only have a handful of minutes per day, Hearthstone really fits well.