I think if they have any sense they won't waste a penny doing that.
As it currently is they can easily manage to operate arrivals on 23R and departures on 23L (or arrivals on 05R, departures 05L when north-easterly ops) in dual runway ops.
All it would do is allow 05R departures and 23L arrivals and what is the benefit of that? Either way your aircraft is going to end up right at the bottom of the airfield miles from the terminals.
They certainly don't need to operate mixed mode so I really don't see the point in doing it.