I think the way events are at the moment are fine as they have actual structure to them. EPs can change spawns, give weapons and if needs be vehicles at the correct moment. 15K HP is just a breeder for HP rushing, and places like the GR wouldn't stand a chance.
Events are only boring when you are getting absolutely annihilated and that doesn't happen often.
Also a lot has changed since the 64 slot servers, and those type of events wouldn't really work anymore unless done by a small team of staff members as a back-up event.