Indeed, I just find the timing strange.
If I were leading a newly established democratic regime, and there were possible ways to block the disperal of power, that's the kind of thing I'd think about when I took over. You know, making sure your own position is secure and there is a clear path and timetable.
So why not sort this out when Mursi first stepped in? It's a lot easier to take "executive powers" in such times of transition, and with the right PR/backing it's been proved not to be much of an issue in other nations.
When changing an entire society at a fundamental level, I would think that the existing judicial system would have to be largely scrapped to accommodate the breadth of change. This never seems to happen. Strange.