If you don’t think there is any room for your sprints to be better then you’ve fallen into the trap where you think everything is perfect, everything is wonderful, everything is amazing and you could never do any wrong ever, ever again.
And as soon as you read that statement you probably thought – “Well they aren’t that great, the board needs some tweaking, I feel like we are sometimes missing items that fall into this exception category and our estimates aren’t always there when I need to report them up to the rest of the company, etc, etc, etc.”
See, they can be better.
Don’t go tweaking for the sake of tweaking, but know, just like your code, there is always room for improvement and should always be continually improving them.