I think we need reasonable limits on just about all "intellectual property". For copyrights, the content creator's remaining natural life plus ten years, or 40 years total, which ever is longer.
Reasonable is the opposite of arbitrary. To be arbitrary is to have no reason behind a choice. "Maximum of life plus 10 or 40 years" is arbitrary. There is no reason to it. That is why there is no patent reform. Because a small handful can rally around "longer" because that does have reasons (even if you personally don't like them), but no one can rally around a random choice. Until you can actually come up with a plan with REASONS then no patent or copyright reform will ever occur because no one will support you.
For patents, there should be a requirement to produce and sell the idea in the patent after a few years or to demonstrate a reasonable attempt to do so, and that different kinds of inventions should have different lengths of patent protection.
Again more arbitrary crap. What counts as an attempt to sell is completely subjective. Almost everything is for sale at some price. And begging for different lengths of time for different kinds of inventions? More arbitrary guessing.
I want people to get paid for their work
I hate when people say this. No you don't want people to get paid for their work. If your neighbor paints your house while you are away, do you want him to get paid for his work? We want people to get paid for what others agreed to pay them, regardless of how much "hard work" was involved.
but at the same time, if that work has caused significant cultural change then there should be a point when that work is released to that culture, instead of licensed to that culture for a fee.
Desires are not policies. You basically just stated that you both want IP law and that you don't want IP law. You just can't decide so you come up with subjective (that is, nonexistent) qualifiers like "cultural change". And all the time those who want IP law rally around 1 objective goal: longer longer longer. It is why IP law won't be "reformed".