Blizzard has 4 IPs, 3 of which were created in the 1990s and have been milked pretty much dry. The 4th one has been overshadowed by BR games.
I've always loved Blizzard games, but it does feel like they've stagnated quite a bit in recent years.
OverWatch has been a very successful new IP for them, but it's just not my kind of game.
Hearthstone is a game I used to love playing, but if you don't play regularly then you fall "behind" and it then becomes unsatisfying to play at all IMHO.
Heroes of the Storm is honestly my favorite MOBA game, but they've dropped support for it unfortunately. I don't like how they monetized the game, its always felt like I needed to buy a stimpack in order to feel any progression while playing. People don't like having to buy XP boosters, and I wish they had simply eased the progression curve a bit to make playing feel more rewarding.
I played WoW for many years but around 2012 I just wasn't playing enough to justify the monthly fee anymore. If it went F2P I'd start playing again today.
Diablo III is fun but its become very stale since it doesn't change anymore due to minimal support now. I feel like they gave up on it way too early, or they've taken too long to bring out D4. Immortal is nothing I'm interested in, it might as well not exist to me.
I love some StarCraft 2 now and then but it is a very difficult game to play casually. I am an eternal bronze league hero in SC2, and I play most of my matches either against the AI or in with other people in co-op against the AI because it's the best way for me to get any enjoyment out of SC2. The game's skill ceiling severely limits it's own playerbase IMHO.
I love Blizzard games, and yet oddly they currently don't have much at all to offer me in gaming. Nor do they have anything announced for me to look forward to. I have to wonder how many other Blizzard fans are in the same boat?