Simple - have an optional security level where not one but two+ fingerprints are required, and to make it cia level secure, all it to be a pattern. Ie left index then any other finger then right middle.
Congratulations, you've just made it complicated enough that most people won't bother using it.
A much more pragmatic approach is to not worry about the "hack."
A detailed write-up of the exploit from one of the hackers pretty much explains that you need about $1,000 worth of equipment, a VERY good unsmudged fingerprint sample, about 10 hours of time to devote to making the latex replica, very high skill level with high res cameras and photo editing software, and a lot of luck and patience OR an incredibly stupid/incredibly willing iPhone 5S owner who has no problem giving you more fingerprints if you mess up.
The same person who has the resources to lift and replicate your fingerprint will probably find it easier to let the TouchID scans fail after 5 attempts, so they can plug in a
cellebrite and try to hack at your PIN, or hack at your iCloud password, and steal the data/device that way.
Bottom line: TouchID isn't perfect, but it's secure enough that there are only two reasons someone would hack away at your TouchID:
1. Because they're 1337 hax0rs who want the notoriety of saying they hacked TouchID so they can spread some FUD about the tech, or
2. They're really dumb, have a lot of time and money to burn, and are gluttons for punishment.
Someone has to be REALLY, REALLY motivated to get into your iPhone to do this, and have the time, money, opportunity and resources to do it correctly... PLUS the stupidity to not realize that there might be easier ways to get what they want.
The average apple-picking thief on the street isn't gonna have the time or skills to pull this off. Nor is the average snooping co-worker, acquaintance, frenemy or significant other. In fact, if someone actually DOES try to do this to your iPhone, then you're probably got the attention of some really tenacious people, and the safety of your iPhone is likely the least of your worries at that point.