Yeah, have the Babenbergs survive and pretty much end up much like the Habsburgs, getting Hungary and Bohemia eventually. They might even end up getting Bavaria, being from there.
If the Babenbergs survive they might well get their ambition of making Austria a Kingdom. Also they might not get into the mess the Habsburgs did by marrying into everyone all over and getting widely scattered territories and can focus on expanding/developing their core of Austria.