Someone smart enough would never have posted in the way you had hence the 'smart' reply.
The aircraft involved in the accident at Las Vegas was not a hull loss as it was repaired and put back into service and was replaced at LGW by a spare from LHR.
No single aircraft is flying any single route so the previous ceasing of LGW to Las Vegas had nothing to do with the accident at Las Vegas.
The LGW British Airways long haul fleet is purely Boeing 777-200 so no chance of seeing a 'shiny new 787' on the route for next summer if ever.
And what do you actually mean by a 'lively flight with excited passengers starting the party where possible'?
What sort of ridiculous comment is that, you are aware it was the outbound flight ex Las Vegas flight!