if there will be no new lvlcap until we come to mordor, all players, who level through the content after that cap comes will be at cap before even entering the new area. theres just too much experience going nowhere in gondor. its time to have a use for it.
I'm using quests to grind out heritage runes through LI decons. So it is not entirely useless. Players that follow when a new cap is unlocked can skip ahead to the new level cap regions, or use all this xp to level early. It gives you options, which is one of the best parts of LotRO. Don't like Forochel? Well go level in the Trollshaws then. Had enough of Dunland? Take on Mirkwood instead. When we don't have those options then leveling can get extremely boring. Don't like Rohan? Well I hope you like farming task items and running skirmishes... for 20 levels.