still, considering reaching the level 40 takes about 4 450 000 000 or the double i'm not sure, 45% XP is a little deceiving as the only strategy to level more would be to get a very high Xp multiplicator while getting heirloom items is fun... that means it gives nothing more to retire after 15 times except items and makes you very reliable on the trade luck if you want the best equipment, or else heirlooming and starting all over again just for an item is much less fun than knowing you have a multiplicator... I don't think more XP % max is a bad idea since it is totally impossible to level past a point as the xp cost is exponential...