I think Jane Austen builds suspense well in a couple of places, but she squanders it, and she gets to the endgame too quickly. So I will be working on those things.
One of the reasons we all still read Jane Austen is because her books are about universal things which still matter today - love, money, family. They haven't gone out of fashion, so it's not throwing the baby out with the bathwater to rework her in a contemporary style.
I won't be attempting to write Jane Austen-style prose - that would be suicidal. But I will attempt to bring the highest level of my own prose, and to make it sparkle.