4% XP Shrines aren't all-that. Imagine you got 10,000 XP for a quest.
10,000*.04 = 400 measly XP. Big deal. That is sooo worth it, right?
1,900,000 XP required to cap a toon. If you happened to have the 4% going for every quest..
1,900,000*.04 = 76,000 XP total over your toon's lifetime. Really? That's like 7 decent quests.
Since these low bonus amounts are so low, how about giving us slightly higher tiers?