Funny I see that about White Collar (which hasn’t been on as long) more than Burn Notice.
The premises that some tv programs just do not hold up well ongoing series. They would be better served to be mini-series, I think.
I enjoyed Political Animals. It has about 6 episodes, IIRC. It didn’t get enough viewership to get renewed, but it didn’t have a cliff-hanger ending the left viewers hanging after it was cancelled.
There are still many TV series from the past 40 years that ended with cliff-hangers and no series resolutions.