According to today's Washington Post, that's the leading alternative to repeal at the moment.
By the way, why do reporters keep writing about the estate tax affecting "only the top 1%"? That top one percent represents those who leave the estates from which the tax is extracted. Being dead at the time, they don't really "pay" anything. Basically, their heirs pay. Mightn't an estate have two or three, six or eight, or even 10 or 12 heirs?