Hi - I'm sure it will be fully taken on board in the right spirit. This was the first of these events (OK technically the second as there was an official drag a long time ago), and there's a lot of learning to happen.
Proper Communication (working walkie talkie between start, finish and the paddock would have helped the whole meet run a lot slicker. Winners could then be sent straight back to the start to line up n run again. Agree there was too much time in between sessions but this was a result of bad comms on the day. At the end of the day it's a head to head knockout, so it should be pretty easy to work out the next pair (and then communicate that properly to officials, competitors and spectators).
Yes, a working PA system would help keep spectators and competitors in the loop of what was going on.
Crowd control is a bigger issue, and one that will come into play for the forthcoming night race in Colombo. Cops are really ineffective and any other arrangement will be costly - albeit less than the cost of a life. A number of delays once events started happening were due to the crowd coming way too close to the track.
The only was I guess would be to have some form of a fixed barrier on the LHS (as you drag) in place to keep the crowd safe, and then on the right keep people inside the park. This then needs policing properly .... sadly easier said than done.
Nevertheless a great days racing was had and as you say hopefully the first of many ;-)