Israel should just have a system where it has the President appoint justices to the Supreme Court and given the President is not part of parliament, it still preserves checks and balances.
The judicial branch also needs checks and one way to put a check on it is by having one of the other branches appoint justices and the other confirm appointments.
Well, the president just appointing judges would entrust a single individual with more power than a legislative body as a whole. Today I'd certainly have a lot more faith in Herzog than Bibi's far-right cabinet and their enablers in parliament, though that may change with new elections.