Thankfully only 5 injured at last report. Those mega hotel ships are a huge problem for the Venetians, visiting Venezia I've seen the wash these monsters create, even when being towed, they usually dispense with tugs and self power into the dock from around the same point of this incident and the damage they do is eroding Venice's very foundations. Having been in a Gondola hit by the wash of a much smaller boat I'd hate to be in one when one of these pass through, the wash surge regularly over tops the canal sides much further into the small residential 'street' canal network than most realise.

The biggest problem is overcoming the cruise lines marketing of 'sailing through Venice' as part of their appeal, the alternative route via the Southern lagoon entrance using the commercial docks channel would be better for the City, and in my experience having worked on earlier liners enable easier turn-arounds as passengers will be less distracted sight seeing rather than getting ready to disembark.