I would prefer an an status page, like altcoinstalks.com/status
I don't use telegram and probably many other users don't as well
I think those external status page services cost money though, and you get them on a subscription. As far as I know, not even Bitcointalk has one.
But I would not go to a Telegram channel just to see if a website is down or not. That's what sites like DownDetector are for.
But if admin wants to try it, it's a very ambitious idea, so he can go for it if he wants.