Using 05R for departures would surely be a bad idea anyway? Which operators would be happy at the prospect of taxying best part of 2 miles to get to the threshold? It can take long enough to get to 05L especially if you're taxying from T2!!
As for the airport city idea, it worries me that MAG would be considering investing in yet more off site, non-core activities at a time when the key airport infrastructure is in need of investment. I appreciate that if you have the cash at the minute (which not many do) you can get premium land at a knock down price which may help bolster the balance sheet in the future. The fact remains that to build out such a development will be a further drain on capital resources and won't deliver any benefits in terms of additional revenues for years.
