What I noticed in a smaller event my reg held the other day was that we were doing only linebattles, and due to using somewhat smaller maps the rounds went by a lot quicker, and we were able to pack in a lot more rounds of Battle in an hour than any events we had held before in other games. I agree that map choice is important for the size of event you have going on. That being said, some of the fun I'm finding in this game is being able to attempt and succeed at making those 100m+ shots. I think that a good balance to this is going to be map choice in events going forward. Maps with little cover or elevation change will tend to have regiments holding back and taking potshots, while maps with a lot of cover/buildings/trees will force lines to have to move forward and close distance since there would be little opportunity for those extended shots.
I agree with a lot of that as well, but to also play the devil's advocate. If you do have a map with a lot of garrisonable buildings (granted the event allows garrisoning), trees, etc. It allows the groups that get there first to just camp and wait for people to come to them, which, again, the other side isn't going to be keen on doing due to the accuracy, so they're more apt to shoot at nothing and wait 10-15 minutes for the all charge. That scenario happened at the event I went to last night. It just depends on the regiments participating at that point.