Sully, i saw myself - i posted my suggestions inside that post, but just to clarify
"Ok, imo you need a longer quali (like 30 mins) a shorter sprint race (like 5 or so laps) and keep the final race the same."
I recently did a league race here and the main event was 17 laps which is a nice length - around 30 mins, which makes the main race an hour.
IMO you need a shorter sprint (like 5 laps) and a slightly shorter main race (like 20 laps)