I must say that I dislike the rationale for banning structuring. It's basically a law that bans attempts to comply with the letter of another law without complying with its spirit. Complying with any law should be completely straightforward.
So there are two possibilities.
1. You think the government shouldn't be allowed to track money laundering
2. You have a suggestion on improving money laundering tracking without anti-structuring laws
If you believe the government has a legitimate vested interest in stopping money laundering and you set a $10,000 limit before something must be reported, the reporting requirement might as well not exist if someone can deposit $9999.99 literally 100 times per day without a report being generated.
So what would your suggestion be on how to track money laundering? Or do you just think that's none of the government's business?
Something more reasonable may be: a limit of $10,000 per month (or any time frame) before mandatory reporting. That of course means dropping the hand wavy exception completely.