Good news if it happens; A330-200s are very hard to obtain now at short notice, so I guess it's a question of getting them wherever possible. Even better, the ex-Swiss aircraft will be equipped with PTVs.
I thought the recent agreement on cost cutting meant that the MCO route is not going to be axed.
As for DXB, I'd be surprised. It seems the only reason for going into DXB would be to keep EK out of Dublin, but even that is unlikely. If they did, would EI last on the route. Would EK want to codeshare with EI? Remember that if the two went head to head, EK would have much better resources to outlast EI, so why save the bother and put the 330 on another route ... CPT, perhaps?