You lack imagination. I'm seeing a system where you can change the party you vote for at any time. Not knowledgeable on a topic? Leave it to the people you trust most. But if certain policies are interesting it should be possible to intervene at will.
If people decide on topics they have no clue on that's their right and no worse than voting the wrong parties.
One problem i'm seeing is, people might vote shortsighted like brexit. But i'm seeing parties all over europe only thinking within their legislature too so no loss.