The captcha threshold has been reduced already:
Some reductions in CAPTCHA throttle thresholds, if you have > 10k rep:
- for edits -- reduced by two-thirds
- for post submission times -- min seconds reduced by one half, max minutes increased by 2x
I propose however to make this change available at 5000 instead of 10000.
In my opinion, a user with 5000 proved already that he is not a bot, and also, it would be something to give to people who are "halfway there" to the 10k.