More unique sitcoms.
Remember when the formula for a sitcom was "fat guy, hot wife, odd family member"? It feels like most sitcoms nowadays still care about that pointless formula. the best ones were the ones that strayed away from it, at least in my opinion. The Drew Carey Show, Friends, were the best 90's/early 2000's sitcoms. Right now, How I Met Your Mother and Community. none of these followed that formula.
On that note, similar to what Badpaladin said, certain shows that get huge ratings end up getting canned quickly. That, or they change staff so much that it doesn't matter.
I'd also like to see more national stations like Fox and CBS stream more of their shows. Or, better yet, livestream their stations period. You still have commercials, so I see no financial reason to not do this.