For the last three seasons, Dublin have played all of their home games at Croke Park as part of the Spring Series.
And O'Sullivan (right) agreed that playing at HQ helped the development of some of the county's young tyros over the past few seasons, as they marched to a second All-Ireland title in three years.
"Having played on the pitch before and knowing the environment and the surroundings, those little things do add up. It definitely wasn't a disadvantage anyway.
"Playing your first championship game for Dublin is always a daunting prospect and if there's any little thing you can take along the way to help you, you'll take it."
The Spring Series wasn't helped by the hurlers' relegation from the top flight which denied organisers the chance of attractive double-headers.
The series saw its smallest crowd last March when 10,000 watched the Dubs take on Down at Croke Park. However, that attendance is still too big for Parnell Park, which can hold around 9,000.
While the county's hurlers earned a return to the top flight, Dublin hurling captain Johnny McCaffrey, would have welcomed the return of an eight-tier top flight.
"I suppose it would have been better because you'd get more games; you'd get seven games and that's what you want," he said. "The only thing with the six-team league now, though, is that every game is like championship, it's really competitive. There is no room for manoeuvre."