Charging for runs.

[FeliAiko]

or people will just grind at potd, fates, leves, etc...

Except SE could lock out exp gains in PoTD once you reach lvl 60, just like L50 dungeons never gave out exp at launch. As for fates, if SE's smart they'll have learned from the North Thanalan fiasco and make any exp gains in non-SB areas incredibly slow as to not be worth...