IL can be made more long lasting just by making some simple switches on map design:
Make a smaller size of domination zone and split it in 3 or so zones so fights are diverse and split around the map.
In fortress escort maps, make it possible for fights to happen outside the fort. With the way it is now, with spawn close to entrance, ppl just camp the walls and pony stays there for 30 minutes stuck in entrance.
Make epic bosses spawn in a organized way on weekends at least for the 1st month
Make item progression slower, starting in C or Bgrade with S locked for at least 2/3 weeks.
Add bigger restrictions to the number of healers/wl's/tanks/domis etc according to the size of the map, type of objective, and number of ppl online(tvt = bigger restricion for these classes, domi less, and so on)
Establish clear rules that is not possible to make more than 1 clan, or enable ally ( limited to max 1 clan) so people dont zerg the server without thepossibility of competition from others.
Add a zone for low ranks, where they can PvP between each other for some time while they dont gear (They would have the free choice of going to normal zone aswell - if u go newbie pvp zone u get lesser reward but fair fight, if u go normal zone u get no fair fight but alot of adenas according to gear balance)
Others to come...