Just read the US Senate Bill - 5900. Very long but well worth a scan as the 1500 hours is only one of many significant changes. Mandating multi - crew skills training is another, so is a review of "commuting". Be careful what you wish for if anyone suggests copying it here holus bolus.
By the way in section 209/216 it makes provision for "academic credit" to reduce the 1500 hours.
Fly safe
PJ