As a fellow European this is the biggest surprise of the election, I thought for sure he'd pull a Trump.
Obvious tweaks exist, of course: Even if you keep more individual constituencies than party list seats, they should use some sort of instant runoff/ranked choice/etc. system. But other first past the post countries are dragging their feet on this too, so... we'll see.
We should approach democracy more with the kind of insight that go into making computers secure. Oh, wait...