The kids are getting too old to play their parts. As is Patricia Heaton.
That's the only show I watch as well. I'm glad it got renewed but you are correct, the last sibling will soon graduate high school in a couple of years so not much left for the kids being at home.
Maybe they'll figure a way to get the kids starting their families to get a few more years out of it. Either way, it's been a good show and run.
CGato
To their credit the actors on The Middle have long been playing characters younger than they are.
The actors playing Axl and Sue were both in their early 20’s portraying teenagers. Patricia Heaton is 58.
The actress who plays Sue had angst-ridden 13-year old girl
absolutely NAILED!