Well, i dont think the timetable needs modifying, but it definately needs to be stuck to more. Im not sure the practicing is really needed, although to be fair having everyone there driving round before going into the Qual usually highlights any issues then (ie Lag) rather than dealing with it during an official timed session.
But the breaks need to be stuck to, it doesnt take 5min+ for a toilet/drink break so this in particular needs to be addressed so it doesnt turn into a 10min chit-chat.
After that, the timetable and schedule were stated at the start of the season, that is what we all signed up to do so its a bit late to want to change everything around, nothing has changed since then, its not like 2 months ago it was a 1hr race but because of car tweaking its now 2hrs long, circumstances havent changed.
For the record though, dropping the 50 lap rule would be a good idea for next season, stick to 60-90/120 min races and base the laps on it finishing somewhere between those times.