lol, 554,000k is not that much? Once you got all your mini game quests, your only getting 200 exp a win for the next 5 hours. Not every game is going to be a 25 kill **** fest, some games you can only get a kill or two because the other team gave up or are in hide. Then more often than not, your not going to get the best of teams either, which in that case just going above even in kills can be a huge challenge if you get dumped with 3 of the worst people on the server.
Sometimes it takes 20-30 minutes waiting for 1 game to pop, sometimes it's rapid fire.
Either way, I play a few hours each day and at most at PvP 9 with me topping kills 4/5 minis I can only get around 5-10k pvp exp, which at pvp 9 equates to 2% a day with a 1-3 hour investment. Many times, Sag won't even pop, so that 2% becomes 1% some days. Sometimes, it's impossible to get a win at all because the same 12 keep signing up and the teams are the same every game, if you get stuck on the crap team your just fighting not to get farmed. Other times, you get on the steamroll team every game and still can't get any kills because everyone gave up after 1 or 2 deaths.
Generally though, once I have won all my quests I don't do anymore minis until the cooldown wears off, it's not worth 200 or less exp for a win.
I suppose on a pvp server you could say one could fill the gap with open world, but on US pvp servers that's laughable. I was on tyranny for years and after the cimmeria/tyranny merge you could hardly find any world pvp other than some bad rangers and sins trying to gank people in pin pin.
But saying 554k pvp exp is not that much is laughable.