A couple of comments. First, I'm glad to hear that at least one exploit doesn't work and that it's being monitored.
Most of the counter-examples can be easily explained by the way /who works - when you look for "Tol Barad", you also get the Peninsula, and if you get "49", you have no idea how many might be in the battle area. You can narrow it down by restricting it to specific classes, hopefully not exceeding 49 of each class total in the battle and on the Peninsula.
As best I can tell, the minimum number of people allowed in on each side is 5. I've been queued, then gotten in and was the 6th or 7th, so I don't think it's any higher than that.
An earlier description of how the queuing works seems incorrect - where each time someone enters on one side, the side with the queue pops another one off. That only happens if the teams are even. It can get out of balance if someone leaves (but why would someone leave when there's only 5 minutes to go? 5 minutes for 75 honor even for losing? Might as well stay...). It can get out of balance if a bunch of people are offered entry, but a bunch on one side decline. However, once it's out of balance, no one else will be offered to enter on the larger side until it evens out again.
For the people saying that all the complaining about TB balance are from factions that aren't very good, all I can say is that when we don't have it, we go for 3-10 days before getting it back. When we do have it, we go for 3-10 days holding it, with rare exceptions.
I thought the description of a specific attack strategy was interesting, but I don't think it would work if the defenders simply follow the standard strategy (unless the defenders are REALLY bad, i.e. attackers can take out a group of 10 with a group of 5 fairly consistently).
I think the queuing system is excellent, MUCH better than tenacity (which doesn't really work). The queuing system makes it more attractive to switch to the side that is outnumbered, which means it's positive (stabilizing) feedback, rather than rewarding the side that's larger (which is negative, destabilizing feedback).
I don't know what happens if someone is invited directly to the raid. The correct solution is that they are in the raid, but still don't get to come in to the battle zone. They'd have to queue to be able to get in.