Vueling are really pushing the boat out here by introducing their A321 on this route, increasing capacity even more. Moving the flight to 9:00am is an advantage as you miss the 7-8am rush hour, it will also be a better experience for passengers with less crowds, except with all the building work going on at the moment it will diminish any hope of this!
I could see the LTN-BCN route becoming another LTN-CPH!