Hi!
It seems that there is a really massive bug going on with the Guardians boons. They have no limit in how many targets they affect.
For example 1 guardian can give Empower or quickness shout for over 20 people. In worldbosses its possible for 5 guardians to give a permanent quickness for all allies in shout range and in wvw stability, might and quickness run rampant destroying all balance.
Other professions seem to be running normally. Warrior shouts still only affect 5 ppl and elementalist spells too.