Your expert in all things ratings. :)
Superstore is in season three now, and even with a short first season, season four is pretty much guaranteed for syndication reasons. It's not in any danger. :)
I tend to agree with you, gmpugs. I started watching the show because I was/am a fan of Scott Caan, and I love the interaction between Danny and Steve. Scott now has a reduced schedule so he can be at home in LA with his young family and if one or both of them choose to leave, that, for me at least would be the end of my interest.
To be fair the original series went through a lot of cast changes over the years. They lost their Kono, Ben, Chin Ho, and finally Danny before it finally limped off into television history.
Scorpion is one of those shows that every year you wonder if it will get another season and every year it manages to squeak through. The Brave is getting close to the danger zone, it's sitting right about at the network's weekly average so it can't afford any more slippage in the numbers. SEAL Team so far is doing OK, not spectacular, but OK. It will need to show it can tell a variety of stories and not get stuck in a plot rut.
Inhumans is in trouble. It hasn't started well and ABC can only hope the ratings at least stay where they are and don't fall any further. Hawaii Five-0 just keeps chugging along doesn't it. :) It gets respectable numbers even for a Friday night show. Alex O'Loughlan has gone back and forth in a few interviews now about his future plans, saying at the end of last season, this one would be his last. Now he may be waffling on that. CBS would love to get another couple of years out of the show, I'm sure. The original lasted twelve years (though to be fair the last few weren't very good). So, do you try to beat the original or go out while the show is still well liked?
Weird, it's fixed now thanks for the heads up. :)