There's something incredibly childish about describing a ~23 year old game that still has a healthy pro scene, with a ~11 year old sequel that also has a healthy pro scene as "dead". Most of the "live" games of today will be literally dead in 5-10 years and SC or a successor will still be going strong. It's a Ricky Bobby if you're not first your last mentality, or like trying to explain why my favorite local burger joint should change because they aren't as successful to McDonald's. Obviously a successor like Frost Giant or someone else will have to innovate to leave a mark, but not in the ways you are asking for. There is room for improvement if you look at Brood War and SC2 and take some from both, competitive RTS is too refined to flip the table with a few gimmicks to cater to weak players.
Your definition of dead and my definition of dead are two different things. We both know that.
"Rock music is dead" often provokes people such as yourself.
"OMG there's so much good rock music you just don't know where to find it!"
That response obviously ignores my relatively clear intention of highlighting rock musics fall from popularity.
I'm merely asking the question as to why such a popular genre in the 90s has fallen out of favor so much. I believe I know. Do you?
I think critics also ignore the words in the acronym RTS because to them, RTS is one or two very specific games.
Real Time - Not turn based.
Strategy - Choices made before conflict that influences the outcome of said conflict.
The definition is exponentially more vast than StarCraft and WarCraft.