He even said so in one of his latest video: He is done defending FDev.
With update 5, and the fact that FDev promised more information and immediately cut the information release in half, was what pushed them over the edge.
As I've said, I consider the content creators to be a barometer of community sentiment, simply because a large part of what they do is gauge what that sentiment is so they can get subscriptions. Given this, I'd take their reaction with a pinch of salt too and I'd put more weight on the more... ahem... sober of them, such as OA and D2EA, both of whom have begun to diversify their content and have been increasingly critical of FDev.
Of course FDev could turn this all around in the next six months; I just don't see how they can, even if they wanted to.
It isn't likely, but I hope you are correct and the game is shut down in a few months...
I'd be surprised if it took only a few months. ED could limp along with skeleton support for years, even without any content updates and minimal maintenance. As you say yourself, there's no direct alternative, and until one appears any decline will be slow and painful.
Edit: I vaguely remember that Everquest (never played it myself) was in a simelar slow decline for years, but it managed to tick over until WOW was released and that was the eventual coup de grâce. Anyone with better knowledge on this, feel free to correct me.
What is more likely to happen is that those who have thrown the toys out of their pram will be back to this game (if they even manage to NOT play it) pretending they never went... At least until a real contender comes along, but there doesn't seem to be anyone in the process of producing it currently. (perhaps the Unreal Engine fans here could group togehter and produce the ultimate opposition?)
I'd be surprised if does not appear on the development horizon before long. It may even spur CIG to release SC as a completed game, although I wouldn't hold my breath on that. Or NMS may course correct on development to cater more twoards being more 'commander-friendly' in future updates. My favourite theory is we're going to see some kickstarter appear before long, to jump on the bandwagon - FDev has left a lot of chickens in the wilderness begging to be plucked.