Recently Bungie Addressed XP and how there was a cooldown on earning XP.
They claimed to have fixed the situation but that simply isn't true.
Here's some words from a reddit user, I'll use his info to help people understand.
[quote]The heroic event displayed 3125exp and i had in total 4-500~ mob exp, if the numbers were displayed correctly i should have just about 3.5k. [b]However according to the tracker I only gained 2,180xp.[/b]This is from a PE using a coin, assuming the 25% boost is still true. That's about 1,600xp without subtracting the mob kills. [b]It's very clear that xp gains have been halfed in exchange for no cooldown, yet we're once again being shown misleading numbers.[/b]
So i swamped to another character who was near leveling and killed some mobs. I needed 130xp to reach a bright engram, after 245xp + 1 Legionnaire kill i got it. Xp has been halfed globally, [b]it's not just public events. [/b]
Running a strike to see if it's the same. I doubled check with the recording and not only did i miss count the mobs killed (didn't factor in teammate) there was also a coin being used. Strikes are also affected by the -50% exp. I hopped back in and killed 1 mob to confirm suspicion, display said 43xp yet tracker says 21xp. [b]This is worse than i originally though, strikes are worse off than before.[/b] [/quote]
So like this guy said there is -50% XP earned for every activity in the game.
This is a very poor decision, and It wasn't made in regard to the players.
EDIT:
We have an Official response.
[url=https://twitter.com/BungieHelp/status/934945967194779648]
Bungie Help Made a response on Twitter, (Click this paragraph to read it) I'm not sure if i should to trust what they say, or consider it nonsense. This I think is a way to heighten the recommended XP you need to earn a bright engram. That is not good whatsoever. We still need a better XP system.[/url]
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Just -50%? I would have assumed a -90% nerf considering it is tied directly to Bright Engrams. Bungie doesn't want you earning Bright Engrams, they want you to buy Bright Engrams. As long as EXP is tied to Bright Engrams we will never see EXP numbers that feel good.