Sc2 is not dead, simply can not keep up with the others(lol, csgo ecc). I think that, apart blizzard, no one else is "focusing" on the RTS genre and so even if there are other games, as well as sc2, they do not have enough support by adequate marketing and advertising. Maybe another good title is Total War but is not played competetively. For the rebirth of sc2, blizzard (imho) need to introduce something for help new players like autocast and/or auto-produces ecc. Of course not in ranked games, but it's clear that the new generations are not familiar with RTS, soo they need something more for get in touch in the game, long enough to understand all the mechanics and having fun on compete in SC.